Jump to file at line if query like "myfile.go:123" uniquely resolves to a file

Created by: nicksnyder

Reported by a user:

As a user I want to be able to quickly jump to a file at a specific line if I type in a query that uniquely identifies a file and include :$LINE. For example, in a repo with only one file named myfile.go, typing in a query myfile.go:123 should show me a search suggestion in the menu whose action is "go to file at line" not just "go to file". If I view the search results page for this query, it should show me a search result indicating that when clicked I will jump to the line (right now it would probably show no results because no files contain the literal string myfile.go:123).