Fix #1370 "Grid in section template empty in review and at design time"

Was due to incorrect endElement name.
FB: Improve appearance of readonly repeated grids in section templates

- no padding in non-editable cells for icons and hint
- refactor the CSS a bit
fr:grid supports max="none" in addition to "unbounded"
Static classes on xbl:binding are added to HTML output
Fix #1376 "FB Summary page: title and description remain in English"