EditorConfig UI: Change how the .editorconfig file is saved

[BhaaLseN]

I used the Roslyn .editorconfig as a base, and generally liked how there are spaces around the equals sign:

setting1 = value
setting2 = value

However, updating it with the EditorConfig UI only puts the space in front:

 setting1 = value
 setting2 = value
+setting3 =value

...and that looks really ugly, especially when it now causes the file to use mixed conventions.

It would be nice if it would either be detected from the existing file, or a styling option somewhere (perhaps inside that Editor, perhaps inside Tools > Options, Text Editor, perhaps somewhere else) to pick the preferred formatting. Or even more Meta, EditorConfig specific keys inside .editorconfig :D

Originally posted by @BhaaLseN in #53791