Added color adaptation of plot blocks in dark themes. The block color is now inherited by all elements associated with this block, which makes the storylines more descriptive.

- Changed the way of displaying lines
- Adapted block colors for dark themes
- The line color inherits the color of the block it points to
- Choice buttons inherit the color of the block they refer to
- Fixed video playback in chromium
- Fixed returning to the stage with the "text add" element
- Cursor settings are now applied to "terrain map".
- Fixed communication lines of "terrain map" with plot blocks.
- Fixed the problem of the appearance of a "panel name" without text
- Returned example "example_tour_guide", new version uses plugin "terrain_map"
Changed files in this update