resolves issue #260 & #258 (utilization was caused by a bug in the thumbnail preview)
Merge branch 'master' of https://git.code.sf.net/p/nomacs/code
Merge branch 'master' of https://github.com/nomacs/nomacs
minor changes
Merge branch 'master' into developer

Conflicts:
	ImageLounge/src/nomacs.rc
minor changes
Merge branch 'developer' of https://github.com/nomacs/nomacs into developer

Conflicts:
	ImageLounge/src/nomacs.rc
save thumb fixed
mosaic GUI finished
finishing mosaicing