Desktop: Fixes #15189: Fix Rich Text Editor fails to load in secondary windows

[personalizedrefrigerator]

Problem

#15035 removed a deprecated document.write call to fix a hang when closing secondary windows. The document.write call, however, was required to prevent the secondary window from opening in compatibility mode (TinyMCE does not support compatibility mode).

Solution

To fix the Rich Text Editor regression: Revert #15035.

To try to prevent #14968 from returning:

1. Add try/catch guards that may prevent the secondary window crash/hang from occurring.
   • Note: The try/catch do fix an error overlay related to adding/removing context menu listeners observed while testing this pull request locally.
2. Set nodeIntegration: false when opening secondary windows: it doesn't need to be true (this was another potential crash/hang workaround I was looking into before creating Desktop: Resolves #14968: Fix freeze/crash when rapidly closing secondary windows #15035).

Testing

Fedora 43/Linux:

1. Open 20 secondary windows.
2. Close them all rapidly.
3. Verify that the app doesn't crash.
4. Repeat steps 1-3 for the Rich Text Editor.

Screencast.from.2026-04-23.16-15-02.webm

[mrjo118]

I will give this a test to see whether I can produce a crash with this alternate fix

[mrjo118]

I can't produce any crashes on Windows 10. Looks good to me!