Use timer system for 3D view

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34272 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
New grid icons

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34273 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e