* Renamed All Instance of G1_FLAG_BMP
Renamed all instances of G1_FLAG_BMP to GA_FLAG_HAS_TRANSPARENCY
* Fixed comments and labels
Fixed comments and labels to be more in line with new definitions
When converting to the internal palette, if a color is not in the palette, the ImageImporter now re-maps it only to those non "special" color indices ("special," meaning those for water effects, font, chain lift and so on, as well as the primary remappable color).
Additionally, if the Importer is told to dither the image, it now does not dither colors that are already in the OpenRCT2 palette, or dither between remappable colors and non-remappable colors.
The codes that finds the closest entry that isn't used for remapping has the indices of remappable colors slightly off, and would make some colors in the imported image remappable even though they shouldn't have been.
Comment in header file describing the standard palette corrected as well.
I went over the commits ab7f22f..8726712 (bulk format commits for game actions to management inclusive) and corrected all mistakes I found. Most of them have to do with arrays missing trailing commas, making clang-format indent the entire array or not add breaks between the values.
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).
