[web] removed Objects label from AVview

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35688 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4393 Some css styling to keep controls in one row and option and export buttons on the right.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35689 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4488: lazy creation of drawables, speed up for some spreadsheet files > 5x

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35690 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e