Improve the selection/hover behavior for plots (#5096)

### What
 - Resolves: #5090

Several changes to plots:
- When resetting the plot, don't trigger a selection. Previously if an
item ended up under the cursor **after** the reset, it would end up
selected.
- Additionally, when hovering/clicking the background of the plot,
process hover/selection accordingly.

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)
* [x] I have tested the web demo (if applicable):
* Using newly built examples:
[app.rerun.io](https://app.rerun.io/pr/5096/index.html)
* Using examples from latest `main` build:
[app.rerun.io](https://app.rerun.io/pr/5096/index.html?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[app.rerun.io](https://app.rerun.io/pr/5096/index.html?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
* [x] The PR title and labels are set such as to maximize their
usefulness for the next release's CHANGELOG
* [x] If applicable, add a new check to the [release
checklist](tests/python/release_checklist)!

- [PR Build Summary](https://build.rerun.io/pr/5096)
- [Docs
preview](https://rerun.io/preview/fa4f6d378ee0bde0a4de2b6caa3866b763145b0c/docs)
<!--DOCS-PREVIEW-->
- [Examples
preview](https://rerun.io/preview/fa4f6d378ee0bde0a4de2b6caa3866b763145b0c/examples)
<!--EXAMPLES-PREVIEW-->
- [Recent benchmark results](https://build.rerun.io/graphs/crates.html)
- [Wasm size tracking](https://build.rerun.io/graphs/sizes.html)

crates/re_space_view_time_series/src/space_view_class.rs

@@ -426,6 +426,8 @@ It can greatly improve performance (and readability) in such situations as it pr
 
         let mut plot_item_id_to_entity_path = HashMap::default();
 
+        let mut is_resetting = false;
+
         let egui_plot::PlotResponse {
             inner: _,
             response,
@@ -444,7 +446,7 @@ It can greatly improve performance (and readability) in such situations as it pr
 
             let range_was_edited = state.last_range != y_range;
             state.last_range = y_range;
-            let is_resetting = plot_ui.response().double_clicked();
+            is_resetting = plot_ui.response().double_clicked();
             let current_auto = plot_ui.auto_bounds();
 
             if let Some(y_range) = y_range {
@@ -529,17 +531,26 @@ It can greatly improve performance (and readability) in such situations as it pr
             })
             .map(|x| transform.position_from_point(&PlotPoint::new(x, 0.0)).x);
 
-        // Interact with the plot items (lines, scatters, etc.)
-        if let Some(entity_path) = hovered_plot_item
-            .and_then(|hovered_plot_item| plot_item_id_to_entity_path.get(&hovered_plot_item))
-        {
-            ctx.select_hovered_on_click(
-                &response,
-                re_viewer_context::Item::InstancePath(
-                    Some(query.space_view_id),
-                    entity_path.clone().into(),
-                ),
-            );
+        // If we are not resetting on this frame, interact with the plot items (lines, scatters, etc.)
+        if !is_resetting {
+            if let Some(hovered) = hovered_plot_item
+                .and_then(|hovered_plot_item| plot_item_id_to_entity_path.get(&hovered_plot_item))
+                .map(|entity_path| {
+                    re_viewer_context::Item::InstancePath(
+                        Some(query.space_view_id),
+                        entity_path.clone().into(),
+                    )
+                })
+                .or_else(|| {
+                    if response.hovered() {
+                        Some(re_viewer_context::Item::SpaceView(query.space_view_id))
+                    } else {
+                        None
+                    }
+                })
+            {
+                ctx.select_hovered_on_click(&response, hovered);
+            }
         }
 
         if let Some(mut time_x) = time_x {

tests/python/release_checklist/check_hover_select_reset.py

@@ -0,0 +1,96 @@
+from __future__ import annotations
+
+import os
+from argparse import Namespace
+from uuid import uuid4
+
+import rerun as rr
+
+README = """
+# Hover, Select, and Reset
+
+This checks whether different UIs behave correctly with hover and selection.
+
+### Hover
+For each of the views:
+* Hover the view and verify it shows up as highlighted in the blueprint tree.
+* Hover the entity and verify it shows up highlighted in the blueprint tree.
+  * For 2D and 3D views the entity itself should be outlined and show a hover element.
+  * For plot view, the line-series will not highlight, but the plot should show info about the point.
+
+### 2D/3D Select
+For each of the views:
+* Click on the background of the view, and verify the view becomes selected.
+* Click on an entity, and verify the it becomes selected.
+  * For 2D and 3D views the selected instance will not be visible in the blueprint tree.
+    * If you think this is unexpected, create an issue.
+    * Double-click the entity and verify that it becomes selected and highlighted in the blueprint tree.
+
+### Reset
+For each of the views:
+* Zoom and/or pan the view
+* Double-click the background of the view and verify it resets the view to its default state.
+"""
+
+
+def log_readme() -> None:
+    rr.log("readme", rr.TextDocument(README, media_type=rr.MediaType.MARKDOWN), timeless=True)
+
+
+def log_plots() -> None:
+    from math import cos, sin, tau
+
+    rr.log("plots/cos", rr.SeriesPoint())
+
+    for t in range(0, int(tau * 2 * 10.0)):
+        rr.set_time_sequence("frame_nr", t)
+
+        sin_of_t = sin(float(t) / 10.0)
+        rr.log("plots/sin", rr.Scalar(sin_of_t))
+
+        cos_of_t = cos(float(t) / 10.0)
+        rr.log("plots/cos", rr.Scalar(cos_of_t))
+
+
+def log_points_3d() -> None:
+    from numpy.random import default_rng
+
+    rng = default_rng(12345)
+
+    positions = rng.uniform(-5, 5, size=[10, 3])
+    colors = rng.uniform(0, 255, size=[10, 3])
+    radii = rng.uniform(0, 1, size=[10])
+
+    rr.log("3d/points", rr.Points3D(positions, colors=colors, radii=radii))
+
+
+def log_points_2d() -> None:
+    from numpy.random import default_rng
+
+    rng = default_rng(12345)
+
+    positions = rng.uniform(-5, 5, size=[10, 2])
+    colors = rng.uniform(0, 255, size=[10, 3])
+    radii = rng.uniform(0, 1, size=[10])
+
+    rr.log("2d/points", rr.Points2D(positions, colors=colors, radii=radii))
+
+
+def run(args: Namespace) -> None:
+    # TODO(cmc): I have no idea why this works without specifying a `recording_id`, but
+    # I'm not gonna rely on it anyway.
+    rr.script_setup(args, f"{os.path.basename(__file__)}", recording_id=uuid4())
+
+    log_readme()
+    log_plots()
+    log_points_3d()
+    log_points_2d()
+
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser(description="Interactive release checklist")
+    rr.script_add_args(parser)
+    args = parser.parse_args()
+    run(args)