The HTML Editor template was removed by mistake. It will return in the next udpate (2.1.31).
In the meantime, you can safely use it from the repository (Common/Templates/Display/HTML Editor/HTML Editor).
The Filter Numbers template was indeed deprecated - see (http://www.tersus.com/?Id=4346). This was done as we felt it was too specific in nature and is quiet easily replaced by a modeled implementation.
For best results, use the Firefox browser..