New icons for perspectives

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35260 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for triangle curve, point coord caching

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35261 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e