refactoring share templates to remove duplicates
fixing comment in share
disable group/user menu for public tab
fixing experimenter icon in a tree
fixing bad url
Merge pull request #3124 from aleksandra-tarkowska/share_fixes

refactoring share templates to remove duplicates
Fix copy of help menu.
Make sure the background of the PreviewCanvas is drawn
Merge pull request #3152 from dominikl/windows_ghost_panel

Make sure the background of the PreviewCanvas is drawn
Merge pull request #3150 from jburel/help-roi

Fix copy of help menu.