Fixed potential typecast error

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25414 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3252: reenabling the toolbar for the CAS view (hacky as the previous solution)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25415 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
tweaked vector's arrow size again

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25416 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e