* Introduce isToolActive function
* Ride window: use isToolActive instead of gCurrentToolWidget
* Footpath window: use isToolActive instead of gCurrentToolWidget
* Staff window: use isToolActive instead of gCurrentToolWidget
* MazeConstruction window: use isToolActive instead of gCurrentToolWidget
* Guest window: use isToolActive instead of gCurrentToolWidget
* Map window: use isToolActive instead of gCurrentToolWidget
* LandRights window: use isToolActive instead of gCurrentToolWidget
* Replace SceneryToolIsActive legacy function with calls to isToolActive
* ClearScenery window: use isToolActive instead of gCurrentToolWidget
* Scenery window: use isToolActive instead of gCurrentToolWidget
* Water window: use isToolActive instead of gCurrentToolWidget
* Land window: use isToolActive instead of gCurrentToolWidget
* Widget: replace WidgetIsActiveTool with isToolActive
* RideConstruction window: use isToolActive instead of gCurrentToolWidget
* Ride: use isToolActive instead of gCurrentToolWidget
* TrackDesignPlace window: use isToolActive instead of gCurrentToolWidget
* StaffList window: use isToolActive instead of gCurrentToolWidget
* ViewClipping window: use isToolActive instead of gCurrentToolWidget
* PatrolArea window: use isToolActive instead of gCurrentToolWidget
* TileInspector window: use isToolActive instead of gCurrentToolWidget
* Park window: use isToolActive instead of gCurrentToolWidget
Clang-format sees the text behind `#pragma region` as code and formats it. Instead of stating the copyright and date there, it's now in the comment block right below it. The text "Copyright" is left in the `#pragma region` line, as clang-format sees it as a single identifier.
I took the opportunity to normalize the dates, and add the copyright notice to the source files where it was missing them (except for third-party and the generated resources.h file).
* Update includes in PlatformEnvironment.cpp
* Update includes in ParkImporter.h
* Update includes of OpenRCT2.h
* Update includes in Intro.h
* Remove unused include from Input.cpp
* Update includes of Imaging.h
* Update includes in Game.h
* Update includes in Editor.h
* Update includes of Context.cpp
* Update includes in Cheats.cpp, CmdlineSprite.cpp
* Update includes of some source files
* Update includes in some cpp files
* Update includes in some cpp files
* Update includes in TextureCache.h
* Fix tests
* Update includes in Font.cpp
* Update includes in LightFX files
* Update some includes
* Fix GCC builds
* Update some includes
* Update some includes
* Update includes in FontsFamilies.*
* Update includes of Console.h
* Improve includes in Window.h
* Improve headers in Viewport.h/Window.h
* Fix MSVC build
* Fix network-less builds
* Reduce inclusion of Map.h
