[FEATURE] sap.m.Bar/BarBase css styles for HCB theme

[INTERNAL]
- some changes in borders

Change-Id: I3508ce93bc335f88839412e44faa8b851a791a20
Signed-off-by: Lidiya Bobeva <lidiya.bobeva@sap.com>
Merge "[FEATURE] sap.m.Bar/BarBase css styles for HCB theme"