Hotfix 1.9.12

UPDATE: Localizations (de: all; zh-Hans: research, tutorials, ui; zh-Hant: research, tutorials, ui)
UPDATE: Maps page header will now show for first time players as well

FIX: A track loop could be built causing a soft game lock scenario
FIX: Contract confirmation dialog did not open correctly & did not work
FIX: Right clicking allocated signal in build mode did not deallocate signal
FIX: Timeline in editor is always set to 00:00