Entity selector: Check for entity id when validating input

Change-Id: I9e06adbfa61df3d259512c6b001b59897bec8f2f
Entity selector: Show id when focusing an entity without a label

Display the entity id in the input element when focusing an entity that has no label from the
suggestion list.

Change-Id: I04e5e53cc4b312cdab426bee8db429423d600dfb
Merge "Entity selector: Check for entity id when validating input"
Merge "Entity selector: Show id when focusing an entity without a label"