Add a move mode for your own character

[ClaudiaMia]

To help with the issue of not being able to move your character when the name is covered, a new move mode should be added for your own character:
Add a "Move" button on "Room" tab next to the other buttons of your own character that toggles a move mode for your character.
The move mode renders the two move icons from the room devices' move mode under your character, but above everything else on the canvas, so you can always drag it easily.

Clicking on the left movement button will also cancel the move mode (same as for room devices).