When in readonly view, Move Mode should be on

dserodio

Since it's very easy to drag an object by mistake, I have the habit of enabling Move Mode when I open a Mural. But when I have readonly access to that mural or I'm looking at a template sample, clicking on Move Mode doesn't do anything, and neither does Alt+M.

When I'm viewing a mural in readonly or viewing a template preview, Mode Move should be automatically enabled: the icon should be "on" (dark background), and the cursor should be a hand. This would be consistent with the readonly behavior.