[FIX] hover state for disabled button in transparent toolbar fixed
[FIX] hover state for disabled button in transparent toolbar fixed

Change-Id: Ib2e716c0683af23848149df3a1be021940c499ad
BCP: 1780255104
cschuff/openui5,cschuff/openui5,SAP/openui5,SAP/openui5,nzamani/openui5,nzamani/openui5,cschuff/openui5,SAP/openui5,SQCLabs/openui5,SAP/openui5,SQCLabs/openui5,nzamani/openui5,SQCLabs/openui5