Add a filter and sort function to the assembly tree based on
1. Search everything (filenames including extension, iproperties)
1. Text filename search
2. iProperties search
3. Selection of file type
4. Parts not fully constrained
When the filter is active the browser would only show the matching files and others would be hidden. The text could change colour to show that it is filtered.

The filter interface could function as it does in excel where there is a text search and also filter by types listed above
