Prevent creating any type of file with a leading dot

[SekoiaTree]

Fixes #62497, ports #62940 to master. Tested with every filesystem dock option, as well as saving resources and scenes from other docks.

Co-authored-by: gotnospirit gotnospirit@gmail.com

[AThousandShips]

Since this is a port I'd say adding the original author as co-author is appropriate

[SekoiaTree]

Sure! How do I do that?

[AThousandShips]

Add

Co-authored-by: Name <Email>

Get the details from the original PR commit

[AThousandShips]

Please squash your commits into one, see here

And also add the co-author

[SekoiaTree]

@gotnospirit I need your email to add you as coauthor, but I can't find it anywhere :/

[SekoiaTree]

Squashed commits. For co-author, I can't find the email anywhere. There's a noreply address from github somewhere, but idk what it is either.

Edit: of course, I immediately find it. nevermind about the address, then.

[KoBeWi]

You can get the author's email from commit's patch
https://patch-diff.githubusercontent.com/raw/godotengine/godot/pull/62940.patch

[SekoiaTree]

Yep, found that immediately after... Sorry!

[akien-mga]

Thanks!

[YuriSizov]

Can't be cherry-picked, unfortunately, as it depends on #78744. Can likely be redone for 4.1, but it's not extremely important.