Removing mainDirection field from GeoElement, we may add it later as cache for getMainDirection into the classes where it makes sense

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35490 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removed myElements from GeoElement

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35491 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Broken CAS view because of null pointer exception - fixed

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35492 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Sync EV3D position to settings

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35493 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[cas] make empty cas cell bigger, to fit input box.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35494 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e