Across Toaster, the search and the filters interact as follows:

* The scope of the search is always the full content of the database, therefore searching overrides any applied filter

* The scope of the filters is always the content of the table, therefore if you filter after searching the filter applies to the search results only

The BitBake variables table does not work like this. Searching does not clear the default Description filter, and therefore hies any search results that do not match the filter. 

The default Description filter applied to this table should be cleared if: 

* The user searches
* The user applies one of the "Set in file" filters
* The user selects "Show all variables"