Triggering "afterremove" on the widget managing the remove process

Change-Id: Ia584a60198ef599feb1613478f0203eaa6c2aac1
Introduced setError in claimview and referenceview widget

"setError" handles setting or removing error state making it possible to set an error
from outside of the widget (e.g. by a widget managing claimview/referenceview widgets).

Change-Id: Ic120845b8d567f45fc676729c146a30dc3c5292d
Merge "Triggering "afterremove" on the widget managing the remove process"
Merge "Introduced setError in claimview and referenceview widget"