fix: all files selection logic on linux

[codebytere]

Description of Change

Closes #34492.

Fixes an issue where passing { name: 'All Files', extensions: ['*'] } in the filters param of open or save dialogs on linux would disallow choosing files without an extension. This was happening because we were modifying all filters passed in to prefix them with *.:

electron/shell/browser/ui/file_dialog_gtk.cc

Line 39 in 99b86a0

std::string pattern("*.");

meaning that the All Files extension would turn into *.*. This meaningfully changed behavior, because * in isolation allows a user to choose any file but *.* allows a user to choose any file with any extension but the extension must exist. This corrects that behavior.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixes an issue where passing { name: 'All Files', extensions: ['*'] } in the filters param of open or save dialogs on Linux would disallow choosing files without an extension.

[release-clerk]

Release Notes Persisted

Fixes an issue where passing { name: 'All Files', extensions: ['*'] } in the filters param of open or save dialogs on Linux would disallow choosing files without an extension.

[trop]

I have automatically backported this PR to "20-x-y", please check out #34516

[trop]

I have automatically backported this PR to "19-x-y", please check out #34517

[trop]

I have automatically backported this PR to "18-x-y", please check out #34518