Handle old files for 3D view origin

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34132 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Try to avoid "false dragging" for interactive boards

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34133 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3392 rounding in Points tab too.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34134 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e