[UX/Tech] Use Proton-GE instead of Wine-GE as default and as recommended

[arielj]

The other day I made a PR enabling UMU by default.

With that in place we can now make Proton-GE the recommended/preferred compatibility layer to be used.

I updated:

• the default if no wine is present
• updated the wine manager to make it the first tab
• changed the copy at the top of that page to reflect the new recommendation

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[CommandMC]

I've yet to test this on a clean-install, but code LGTM