Fixed some related issues.

 Interact with item bug with eraser

 Draw lines and move

Selected items can be moved by any frame of any item.

 Write text : Select the text

Improved performance of loading text from old format.

A small correction for audio item design... strange, it was good on windows and linux, but works not the same on mac.

Improved recognition of song's title.
Some code removed from header.

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.