Serious bugfix: when multiple HTML5 applets were on one page, the formulas disappeared from the inactive applet

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23337 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
This part of the previous commit is not needed after members are not static

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23338 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e