Automatic merge of T1.4-458-g992c4f7f0 and 11 pull requests

- Pull request #525 at 614b222: TCS extensions
- Pull request #613 at 39fb000: fix: Use properly FPS-independent smoothing function
- Pull request #616 at 1b168a0: Improvements in graduated/full release braking
- Pull request #617 at 99c6474: 02m: Removed menu option Debrief Evaluation. Now always available.
- Pull request #619 at ea10bfc: Adjust HuD to display relevant parameters for DM locomotive
- Pull request #620 at 67c67f1: Adjust kinietic friction calculations
- Pull request #624 at 01231e1: Menu option04 - invert controls
- Pull request #627 at 452a72f: Improve advanced adhesion model
- Pull request #629 at 34abd9c: Refined label for downloading Testing Version
- Pull request #630 at 688d0cd: Sky Color Fix (Addresses Trello Roadmap Card #367 for More accurate sunrise and sunset)
- Pull request #635 at b731488: Minor steam locomotive issues.