Freezing/Grey screen at startup

[jeffshee]

As reported by @S1rPh0en1x in #7:

And I found a "solution" that prevents freezing or a grey screen at startup, you can prevent it by closing the overview directly. Extension which prevents overview at start-up: https://extensions.gnome.org/extension/4099/no-overview/

The workaround is to simply disable the "show overview" at start-up.

Roadmap:

• [ ] Investigate the root cause of this issue.
• [ ] If the root cause is unfixable, implement the workaround.