Fix summary header update after filter change.

Change-Id: Ieb73c29826cfdbb7c2629d91bc986372c096ff8b
JIRA: CYAN-1760
Contacts: HU Translation

Change-Id: I0fb8a7eaa1e22b112f91cd7ebb989992c1529596
Merge "Fix summary header update after filter change." into cm-10.1
Fix NPE.

Change-Id: Ic64ca7923dab8acae194e310480bade52b93f815