[Feature] Play mode in a new window

[labordep]

To discuss, this feature need to be more thinked.

The idea is to test the current edited project into a dedicated window as the "final application" window.
The user can test the design in a representative window (Morphic or SDL).

The idea is to propose to open the project in a dedicated window to test it in a real situation.
This can be a button which is opening a new window with the current project instanciation.
The button can be the same button as "test" mode with an array to select in a list the type of window.
For example:

• Switch to test mode / editition mode
• Open in a new OS window
• Open in a new Internal window

If the project already cames from an existing running view (edition) this play button open a new window in addition of the existing view, not a replacement.
Very similar to the Pyramid Tab overview button "Open in new Space" but directly available from Pyramid window.

This feature was extracted from this issue : #113