MOBI-1007 DataView columns not aligned
- add desktop padding for headers to adjust for desktop scrollbar
- update dv example detail region so that widths do not shift when activating rows

git-svn-id: http://anonsvn.icesoft.org/repo/icemobile/trunk/icemobile@40844 8668f098-c06c-11db-ba21-f49e70c34f74