[UI] Editing parser aggregate updates

We should integrate existing Save based synchronization method with the Apply/Discard.
Two different kinds of saving like immediate save on edit/creating sensor mixed with the Apply/Discard on editing/creating aggregates would be both confusing for the user and hard to maintain.

Elements changed by Edit has to be marked as dirty just like elements changed by grouping.

Change the save button copy to 'done'.

Ensure the 'name' field is not editable in this mode.