[FIX] Core: Keyboard Fast Navigation (F6) - always prevent default

Change-Id: Ia2999c25bcbeeb288c2ca4adf2750868bb3af247
[FIX] sap.ui.Device: Fix test for mobile mozilla browser

Change-Id: I3b396c6adb429da66a6e8b55ea70da4cd80db29d
CSS: 0120031469 0000809392 2014
Merge "[FIX] Core: Keyboard Fast Navigation (F6) - always prevent default"
Merge "[FIX] sap.ui.Device: Fix test for mobile mozilla browser"