0.7.1

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- Add preferred app helper for Chromium (bug #8398).
- Remove package manuals and link to online documentation.
- Queue an icon view resize if the requesitions don't match.
- Add new API exo_icon_view_get_item_{column,row}.
- Add keynav-failed to ExoIconView.
- Show Preferred Application in settings category.
- Don't destroy already destroyed widget.
- Translation updates: Chinese, Portuguese, Lithuanian, Norwegian,
  German, Bulgarian.