[FIX] sap.ui.table.Table: rendering issue with invisible fixed columns
[FIX] sap.ui.table.Table: rendering issue with invisible fixed columns

- fixed columns are incorrectly rendered in case when some of
  them are invisible

Change-Id: I6133d72c39913daa6b52870b7c33c77ea2f9ccd0
BCP: 1770292977

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