Simplify list selection in UI

[Rast1234]

Currently clicking a mod selects it. Users click to view description and then have to unselect by clicking again which is confusing.

• Remove this behavior
• Make multi-selection possible with Ctrl
• Probably some issues can arise from uncertain state of currently clicked element. Is it selected or not?
• Enable/disable a mod with a dedicated button toggle instead of drag-n-drop
• Refresh btn should close modinfo panel

[Rast1234]

... You know, it'd be nice if SyncFaction went "Hey, you've changed your mods enabled/disabled but haven't applied" when you press run game, and gave you the option to run anyway, or apply and then run, or cancel the run input.