core (XMLUI): Dialogs are now managemed in XMLUI: - currents dialogs are available: - Message: a classical informational/error message, usually a popup that user has to close after reading - Note: more discreet message, usually a notification with a timeout (user don't need to close manually) - Confirm: a Ok/Cancel or Yes/No dialog - File: a dialog to get a file or dir path - dialog_opt parameter is used to customise dialogs - submit_id is used in a similar way as for forms