On desktop, now there Help menu will have an "Ente Help" option instead of "FAQ"
(Unrelated: I noticed that user facing strings in the desktop app are not
localized).
The only place remaining after this is the sidebar on mobile
(`support_section_widget.dart`), but I wasn't sure of what string to use (and
how to add it to the localized strings for mobile) so I've left it unchanged.
a4ecc2c344