Avoid saving EditorSettings on startup

[KoBeWi]

Similar to #89248
EditorSettings were saved when launching, because of dialog update.

[akien-mga]

Thanks!

[AeioMuch]

This seems to make the Editor Settings take a while to close for me, is it normal ?

[KoBeWi]

Are you sure this PR is what caused it?
It's not expected, but slow was already a problem before.

[AeioMuch]

Are you sure this PR is what caused it? It's not expected, but slow was already a problem before.

I tried to do a checkout of the commit just before this one got merged, and the slowdown disappeared. Then checkout the merge of this one or everything after and the slowdown is back.

Before, closing the window by pressing the X button is instant, after it takes ~7seconds (on debug build). The editor also freeze for a bit after the editor settings window is not visible anymore.

The slowdown disappeared and got fixed for good by pressing the Close button instead of the X button of the window itself. Removing the editor_settings-4.4.tres will make the issue come back.

[KoBeWi]

Open a new issue with a minimal project.