marisn: Add remove icon for v.digit. A downscaled version of a status-error.gif icon (merge from develbranch_6, https://trac.osgeo.org/grass/changeset/33659)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34299 15284696-431f-4ddb-bdfa-cd5b030d7da7