[INTERNAL][FIX] sap.m.CheckBox: Fixed label positioning
[INTERNAL][FIX] sap.m.CheckBox: Fixed label positioning

Problem:
When the checkbox is placed in toolbar and it is only child,
paddings were overwritten.

Fix:
Added new selector that prevent overwritting of paddigns.

Change-Id: I8af93a141e5c54742e1f0d256f5a3decda8bc7bd

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5