Version 1.4:
- added help instructions
- preparation for the Slide-Show mode

Version 1.3:
Added following operations for the scaled images:
- rotate (90, 180, 270 degrees)
- flip (horizontal & vertical)

Fixed the issue with the missing images after restart

Version 1.2:
- select cropped / scaled images
- select the border visibility
- select the border size
- select the border color

Screenshots: