Request: populate the value of a search input

Context: a user makes a search in one view, which triggers opening another view that also has a search input. It would be nice to populate that search input with some data from `$params` or any other source as you would for any other input.

No file or test is named. Start by tracing how navigation opens a second view, how $params is passed, and how search inputs are initialized; confirm whether an existing input-population path can be followed. Done means a search input in the opened view can receive data from the originating request or another defined source.

Written by the indexing model from the issue text.