New icons for perspective and 3D view

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35200 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Intersect tool line / plane

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35201 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e