XWIKI-22551: Information box content lost when multiple users update the macro...

XWIKI-22551: Information box content lost when multiple users update the macro parameters at the same time
* Wait for the editor to be ready before focusing it when coming back from the macro wizard.
* Mark the editor ready after the event loop (i.e. with a slight delay) and double check that it's ready
* Update widget selection after restoring the selection as a result of a remote change