Treat all files with git{config,attributes,modules}/editorconfig extensions as properties files

[NotWearingPants]

This PR fixes #103042 (again), as I found more occurrences of the issue -
files with the extensions .gitconfig, .gitattributes, .gitmodules, .editorconfig are not being considered of type Properties,
unless they match that exact filename, with nothing before the dot.

How to test:
Create and open files named john.gitconfig, server.gitattributes, client.gitmodules, windows.editorconfig.
The language mode for them should be set to Properties.

[joaomoreno]

Thanks!