Remove IFAME from WorksheetGUI

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27351 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fixed stylebar buttons on ios, fixed codestyle

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27352 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e