rename component 'id' property to 'stateId'

rename component 'id' property to 'stateId'

ExtJS6 requires a stateId if we want to save the component state
(seems it is not autogenerated anymore from 'id')
this fix the selection of timeframes in the Summary View

also move properties out of initComponent()

also remove code which duplicates framework code:
setting stateEvents to 'select' will save the component state
after a selection by calling applyState()/getState() automatically
so we don't need to specify a callback ourselves and we don't need
the testChange() method since applyState() will be called anyway