Release 1.12.7

Notable changes:
*  2024-07-03 34cb4139 actionless fix(qt{5,6}ct): typo in tooltip bg
*  2024-06-16 384ca4a3 actionless chore: move screenshots to a submodule
*  2024-06-16 c0f51117 actionless fix(change_color): cleaner file structure when exporting gtk 3.0 or 3.20 only
*  2024-06-16 d85deb01 actionless feat(change_color): don't fully clean the export dir, but remove only theme-related files