Refactoring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35485 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[cas-web] pressing space, ) or | inserts input on empty cell.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35486 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Parser functions speedup

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35487 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e