[web] #4462 - spreadsheet fix scrolling. 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35842 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[web] algebra input, prevent moving the euclidian view with arrow keys

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35843 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e