PreviewWidget: Fit mode fixed
PreviewWidget: Fit mode fixed
PreviewWidget: debug output removed
Merge pull request #17 from mbg033/master

PreviewWidget : Fit mode fixed
Merge pull request #18 from slima4/master

added boxwidget
Issue #7
ручной слияние по Issue 14
Merge pull request #22 from NicholasShatokhin/feature

Issue #7
merge