Feature Request: Search bar acts like address bar

It'd be nice if the search bar could act like the address bar like modern browsers, with the ability to search or go to a URL by default.

Right now I have it setup where the default behavior going to a URL, then I use a bang "!s" to search, but it'd be nice to be able to eliminate the bang and set a default search engine for search alongside being able to input URLs.

Start by locating the search-bar implementation and the existing !s handling; inspect how URL inputs and search-engine configuration are currently processed. Done means the bar can distinguish URLs from searches by default and supports a configurable default search engine alongside the existing bang behavior. Add or update relevant tests if the implementation has them.

Written by the indexing model from the issue text.