Switched version 1.1.2.316 from the experimental branch to the default.

* Improvements
- assigned correct liveries to DC7, B707, B727, Comet
- ATR72 and CRJ200 no more need stairways (as they have built-in)
- added a "Terminate Airplane" button to remove stuck airplanes, active only when they are on the way to the departure runway.
- added ramp sorting by ramp number in the schedule window
- adjusted many UI areas to fit different languages
- added Arrival Stack info to the F1 window
- rotated concrete ramp numbers to face arriving plane
- adjusted time position
- implemented showing limit in the airline list
- all available contracts are shown
- take history progress speed into account for the prebuilt game
- don't consider on-demands as delayed
- removed premature night-only contracts
- adjustments for airline items in contracts and better readability for max limit for fuel supply window
- adjusted tier confirmation window
- adjusted next-tier window
- fixed workflow if there is no next tier yet
- added tooltips with localizations to the contract window
- added a scroll for vehicle description

* Bug fixes
- fixed some DE locale relying on community feedback
- fixed research name for Packard D1
- fixed settings for the flight editor
- fixed many localization issues
- fixed placing buildings outside the world
- fixed issues where interior structures like check-ins could remain outside the terminal boundaries when resizing using the editing tool.
- fixed terminal's polygon overlapping onto external buildings
- fixed captured lanes releasing(traffic system)
- fixed current agent lane occupancy and lane load when ForceDone is performed(traffic system)
- fixed capturing for independent lanes(traffic system)
- fixed invisible papi lights on the concrete runway
- fixed workflow
- fixed the wrong layout of the resource button
- fixed displaying wrong performance for terminals
- fixed invisible vehicle after loading if it was saved when occupied and at its parking
- fixed propeller era ramp service building
- fixed issue with airplane engine sounds persisting after airplane departure