[BUG] Inconsistent behavior on refresh when using a local plugin

[michelguerin]

Description

Describe the bug
Loading a local plugin and refreshing the page seems to have side effects :

• when refreshing the page the start page is buggy (showing one, two or zero icons)
• some plugins are deactivated for no reason
• Data from loaded file doesn't get to the plugin (saving it shows a blank file)

To Reproduce
Steps to reproduce the behavior:

1. Load a local plugin from the plugins menu
2. Refresh multiple times
3. Error should appear after one to five refreshes

Expected behavior
Loading a local/custom plugin should have the same effect as using a core plugin.

Screenshots

Start page issue :

Desktop (please complete the following information):

• OS: iOS
• Browser: Firefox Developer Edition
• Version: 136

Hints

This regression is caused by 101aaae

[michelguerin]

This issue is related to commit 101aaae

[michelguerin]

Side effect issue by clicking the plugin in the plugin menu is related to this commit d3b2a0a.
I will split this issue in two.

[michelguerin]

See #1623 for click side effect.