Feature summary (what you would like to be able to do and where):
I would like to be able to use Command-K (or Control-K on Windows/Linux) to immediately open the search field. There are plenty of apps and websites that use Command/Control-K to open their search fields and I would like the same for Wikipedia/MediaWiki.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
I tried using Command-K to open the search field in Wikipedia, and it didn't open.

Benefits (why should this be implemented?):
Just as merely convenience/for power users that use keyboard shortcuts daily.