[FEATURE] sap.m.IconTabBar: CSS styles for HCB added

Change-Id: I31ba23449e27417058be8fa97a3b60576154a82d
Signed-off-by: Evgeni Katsarski <evgeni.katsarski@sap.com>
Merge "[FEATURE] sap.m.IconTabBar: CSS styles for HCB added"