Mapart Helper

Added per-map option for materials counting;
Added ordered dithering algorithms (e.g. Bayer);
Moving/scaling an image with mouse in manual cropping became more accurate;
Added lifetime for closest colors cache that can significantly speed up image converting process when making a few changes in a row;
Added prompt to regenerate palette if it was generated for a different version;

Fixes and minor changes

By default, schematic files (when saved for each map) are now created in subdirectories;
Added option to use unreachable colors;
Slightly improved positioning of fake map position for even maparts;
Adapted UI for minimized window;
Improved /mart-creative give-map-palette - now it creates a new locked map;
Fixed some exceptions when changing mapart size during converting;
Mainly, this update contains codebase changes and reworks which are invisible for users