Now copy/paste can be performed without being grapped by application's actions.
Another bug when removing object fixed (dynamic_cast instead of static_cast) in DelegateItem.

Item is now selected.

UBToolWidget API has been deactivated, there is certainly a lot of bugs, code is ugly.
Remember to fix commented sections (forgotten which ones).

This is not functional.

Audio items cannot be resized in vertical dimension because there are no useful content.

Audio and Video items has minimal dimensions.

SANKORE-774 - toolbar disabled for all items instead media and text items. It allows to calculate items bounding rect correctly.

Fixed restoring of cursors at mouse release event on board.

It's icon is temporary.

Behavior implemented:
1. Can interact with all items without showing items frames (but ToolBar shows).
2. Cannot move items, but can drag images.
3. Selected items appears deselected when Play tool chosen.
4. Play tool don't requires selecting of item before interacts.
5. Cursor looks like tool icon in text and image widgets (should be the same in any others widgets, but now in w3c is not).