#4158 minimum size for the first three angle type

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32337 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
"delete" button won't appear in AV (#2987)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32338 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4158 DecoSegmentModel and appled to desktop 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32339 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e