[FEATURE] sap.m.Toolbar: Added CSS class enforcing certain height in compact mode
[FEATURE] sap.m.Toolbar: Added CSS class enforcing certain height in compact mode

- The Toolbar and OverflowToolbar now provide CSS class sapMTBHeader-CTX which ensures a height of 3rem also in Compact Mode
- Controls like the Tables, Lists, etc. can add this class automatically on their Toolbars.
- Applications are also able to add this class if needed.

Change-Id: I1d6043b04adee674daad3b58e1f6f560076dcf73

SQCLabs/openui5,SAP/openui5,SAP/openui5,SAP/openui5,nzamani/openui5,cschuff/openui5,cschuff/openui5,nzamani/openui5,SQCLabs/openui5,SQCLabs/openui5,cschuff/openui5,SAP/openui5,nzamani/openui5