fix: FeedView not initializing properly if not visible on first load

[dr1rrb]

closes #1666

Bugfix

FeedView not initializing properly is not visible on first load

What is the current behavior?

FeedView subscribes to its Source on loaded, no matter if the template has yet been applied or not. This drives the FeedView to invoke some GoToState which does nothing, and will not do it again when template is being applied.

What is the new behavior?

We wait to have both being loaded and have a template applied before subscribing to the Source.

Note: This also make sure to not load some data if useless, which is the expected default behavior so far.

PR Checklist

• [ x Tested code with current supported SDKs
• Docs have been added/updated which fit documentation template. (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Wasm UI Tests are not showing unexpected any differences. Validate PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Updated the Release Notes
• Associated with an issue (GitHub or internal)

[dr1rrb]

@mergify backport legacy/2x

[mergify]

backport legacy/2x

✅ Backports have been created

• #1780 fix: FeedView not initializing properly if not visible on first load (backport #1756) has been created for branch legacy/2x but encountered conflicts