[INTERNAL][FIX] sap.m.IconTabBar: selectedAll tab outline

The outline of the selected 'selectAll' tab is to wide. The padding is
changed with margin.

Change-Id: Id7710cfb22766898d52e215481b0fc89b73aea1b
BCP: 1482007448
Merge "[INTERNAL][FIX] sap.m.IconTabBar: selectedAll tab outline"