Media control improved.
Code was cleaned.

Fixed SANKORE-902 - undo and redo works fine for deleted Media Items.

Implemented duplication and copying of strokes - Sankore-857.

Impossible to write an ê and an ë using the keyboard

Now coping creates a full copy of already created item. Copy has it's own content (like video, audio or folder) and stores original item properties (like locked, pos, size, freezed e.t.c.).

Trying to position ToolWidget at the right place to move naturally from widgetitem to toolidget.

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.

toolBar size depends on zoom.
audio items has title and borders.

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

Fixed a bug - grouped items cannot be dragged by itself now.

- locked items is not editable now.
- toolbar for text item hides when item is locked

Fixed behavior of toolbar:
toolbar of media items hides after 5s of idle.

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).

Frame buttons

Frame buttons
Part 1: changes in toolbars

D'n'D in widgets works fine now.