#3775 enable shift drag zoom, works from js but I can't test it :-)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30081 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Make checkboxes work again on Android (ignore mouse event if it was already handled as touch event)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30082 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3775 showMenubar works from js. Also, shift drag zoom seems to work.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30083 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3775 showToolbar works from js. (why only undo - redo showing?)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30084 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fix cas redefinitions #232

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30086 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3775 showAlgebraInput works from js.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30087 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e