UX and controls bugfixes

[p]One more iteration over controls and UX to have build in the polished state before upgrading to 5.6
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• [p]Improved cursor controls on the gamepad.[/p]
• [p]Main menu clicks and input context streamlined before migration to Common UI[/p]
• [p]Back action added on gamepad for main menu.[/p]
• [p]Fix unnecessary blood vfx when unit was shot while in cover.[/p]
• [p]Addional pass on Squad widget.[/p]
• [p]Squad lost all units indication on Squad Widget. [/p]
• [p] Localization fixes (a bunch)[/p]
• [p]Fix autopilot being too wonky, by making it too stiff.[/p]
• [p]Some fixes for in-game editor controls with gamepad.
  [/p]