Fix state tag color race condition when deleting a process

closes #1293 (closed)

requested review from @erouchet

assigned to @mlbonhomme

I still have

[Vue warn]: Invalid prop: type check failed for prop "state". Expected String with value "undefined", got Undefined  
  at <StateTag state=undefined > 

in the console

added 1 commit

• 8f1e8675 - no more default undefined

Compare with previous version

resolved all threads

merged

changed milestone to %Arkindex 1.5.2