FIX: Use env path to find executable file to avoid usage of which
CODE: Implement better check for KRA and ORA file size. no more
grep or head. And lookup separated into a function.
CODE: update setDictEntries
ADD: Checkbox no indicator style
FIX merge inputfiles
Added Collage UI
FIX: sizeToggleWidgetWxH allowed values in boxes to have a % symbol
FIX: Sizes preview not displayin in list
Code clean up for collage
Change Convert text to Collage if make collage is selected
Added collage first preprocess functions
FIX: many bugs introduced by collage mode
Added: concatenation mode to collage and Zero geometry

Collage preprocess gets all values to a dict
FIX: Preview uses id of current displayed thumbnail instead
recheck current selection.
Collage first draft working
FIX: XCF with layers wrnlgy parsed
Convert, preview  and Extract adapted to work with Collage
FIX: progress bar not accuarate enough
ADD: Button to review output size on collage
CODE: removed comments
FIX #30 : Collage mode activated

I made my best to make this mode stable to general use, but there is
a still a lot to test and fix.