[INTERNAL] sap.ui.core.Popup: Fix F6 Handling Event Registration

Change-Id: Iaee877e57ee360a7730070fd3be8b8e8f5f53169
[FEATURE] sap.m.Toolbar: Introduce F6 handling

Change-Id: I6f9276d4e182728c6d320677641cfeb0e88e7031
Merge "[INTERNAL] sap.ui.core.Popup: Fix F6 Handling Event Registration"
Merge "[FEATURE] sap.m.Toolbar: Introduce F6 handling"