First reported by @Anthere
The backend search api used is the same for bot, but it seems that when used from the multi-select widget for adding tools to a list whitespace splitting is done differently.
An easy way to see the difference is by searching for "xtools edit" in both widgets:
- From the general search in the production dataset, this will find both "XTools Edit Counter" (xtools-ec) and "XTools Edit Summaries" (xtools-editsummary) as the result for the backend https://toolhub.wikimedia.org/api/autocomplete/tools/?q=xtools+edit request.
- From the list edit search, this will not find any results even though the same backend https://toolhub.wikimedia.org/api/autocomplete/tools/?q=xtools+edit request can be seen when watching XHR requests.