vcl: pImplSVData->maAppData.mnDefaultLayoutBorder is never used, get rid of it

Change-Id: I417e84b2c797ec2c43fb232f4a8412488b6d3ab4
vcl: comment says mnLayout is only used for RTL testing... removing

Change-Id: I76b091c1baa1c89ef5e9b5880e99f72f865a6418
vcl: indent comments in vcl/inc/svdata.hxx

Change-Id: I92a1916c8c7a2f2f5c04085367228c4deb44cf07