Problem: cannot search forms: basic search

[jrwdunham]

Problem

We can't search forms in the new Dative.

Acceptance Criteria

• Clicking the search button toggles the display of a search interface.
• The user can enter a single search term, which will result in a "basic" sub-string search that looks for a match in any (disjunctive) of the transcription, morpheme-break, morpheme-gloss or translation.transcription fields. This gives us 1/4 of the "Smart Search" of the existing Dative. See screenshot
• There should be a button to reset the search query to its default state. Even though this default state is just a blank string right now, this functionality will be useful later.
• There should be a button that "removes the filter" and returns the user to the standard forms browsing view.
• Ensure that the search request is performed using the POST forms/search endpoint and not the SEARCH /forms one. See this issue description for more details.