MT: Disable actions just done until change

Replaced data-cx-mt and data-cx-source with data-cx-state which has
the possible values of mt, source, empty. On change this data-cx-state
will be unset.

Change-Id: I131fafb1e0701bbf438d41fa5d0c3bd981780ec1
Merge "MT: Disable actions just done until change"