Quick fix for #3468 (Graphics2 view and Construction Protocol View can't open after opening a file.)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26987 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3337: doing what was suggested to me (algebra view is 20% instead of 25% now)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26988 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Style bar affects also previewables (at least for conics, angles)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26989 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Don't show open construction protocol button in applets. (#3246)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26990 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e