routes/search: Use params.text as searchText
routes/search: Use params.text as searchText

This fixes a regression introduced by dbf6802 since accessing
`queryParams` on the `Transition` have been deprecated in
Ember v3.x and removed in v3.10.

Fixes #1641.

skylines-project/skylines,skylines-project/skylines,skylines-project/skylines,skylines-project/skylines