Bigger hit area for back button

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34697 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Tiny fix for non-readable conditions

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34698 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e