Editable field on the card

[Gulix]

Kind of like Magic Set Editor, it could be useful to have some card fields (HP, Name, Description, ...) that can be edited directly on the card (right part), and not on the Card Fields (left part).

Currently, we use the FabricJS.StaticCanvas, which don't enable such use. What would that imply using the normal canvas method (needing to lock every other elements, and limiting the textboxes to text-change only) ?