U2025.12.19-1527: Automatic merge of T1.6-186-g21d9ada29 and 14 pull requests

- Pull request #1082 at daa2c74f8: Allow variable water level in glass gauge
- Pull request #1057 at 85bde8ece: Switchable brake system
- Pull request #1081 at a8127a1a4: Brake cuts power unification
- Pull request #1091 at 378be5577: Automatic speed control
- Pull request #1122 at 73c47b4cf: Wagon Size and Centering Controls
- Pull request #1124 at e241a0d12: Built-in PBL2 brake controller
- Pull request #1128 at b6c197fd0: Particle Emitter Overhaul
- Pull request #1158 at 2599bfe3d: Temporary fix for bug 2121985: F9 TCO out-of-range after resume
- Pull request #1169 at 906f204b3: Revise TrainCar.SetUpWheels to Better Handle Unusual Rolling Stock
- Pull request #1175 at d28315e63: Make Data Logger interval configurable
- Pull request #1176 at 4cd961bc7: Remove Implicit Requirement for Engine Name to Come After "Engine ("
- Pull request #1178 at 015769e73: Fix Diesel RPM Rate of Change
- Pull request #1183 at 41911f14b: docs: Add code guidelines for translations
- Pull request #1184 at f5c7a507e: Fix/avoid type initialization exception - 2nd try