Simplified code for preventing repaints

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23582 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Avoid too many repaints in Mobile

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23583 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Avoid too many repaints for undo/redo

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23584 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e