fix CMake architecture auto definitions, added icons to header EditIndexDialog, replace QTextEdit to QScincila, fix checkbox isunique and isbackground properties of index
fix count of Index displaying
start implementation of showcontextmenu for treeitems
fix showcontextmenu intermediate commit
added common base class to ExplorerTreeItems, added showContextMenuAtPos method
code cleanup, fix some little bugs
Merge pull request #147 from topilski/master

CMake architecture auto definitions fixed. Added icons to header EditIndexDialog. Replaced QTextEdit to QScincila. Checkbox isUnique() and isBackground() properties of index. Added common base class to ExplorerTreeItems. Added showContextMenuAtPos() method.