one more commit for exhib placement
bf for 878
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom into bugfix_878
Merge pull request #918 from GiorgiyLutidze/bugfix744_2

Exhib placement vertical restrictions
BugFix #862
Able to close Create- and Edit- Exhibit form without warning, losing work on Artifacts
IsModified flag added
ContentItem unsaved data
Merge branch 'bugfix_878' of git://github.com/GiorgiyLutidze/ChronoZoom into GiorgiyLutidze-bugfix_878