[FEATURE] sap.ui.commons.Accordion: Introduce F6 handling

Change-Id: I41d256685a5d0256ecccf551d99c8ea16f3052e7
[FEATURE] sap.ui.ux3.FacetFilter: Introduce F6 handling

Change-Id: Ie45638d3415f3bf4a783a5b843acce3dc1f79eb6
Merge "[FEATURE] sap.ui.commons.Accordion: Introduce F6 handling"
Merge "[FEATURE] sap.ui.ux3.FacetFilter: Introduce F6 handling"