Better MC Screenshots

Changes:

• Action buttons have been redesigned.
• The behavior of the action buttons has been changed to be more intuitive.

New Features:

• An additional option to minimize/close the fullscreen preview has been added to the upper left corner.
• Added support for double-clicking on thumbnails and mini previews to enable fullscreen preview.

Fixes:

• Fixed issue with unblocked background in fullscreen preview

Tested on 1.21 - 26.1.2 (only core versions) [on MacOS 26.2]