It's a nice day to... LEEEEExIIIIIIIM!
Billy Idol gets it, now you can too. The CiviCRM menubar is getting a major revamp, LExIM style* - the new menubar extension is now ready for beta testing, and once that's complete, it will be ported into the next release of CiviCRM. But why wait, you can get all the new goodies right now by installing the beta extension (requires CiviCRM v5.8+). It gives you a lot more than keyboard control, in fact it's a complete overhaul of the CiviCRM menubar with all the modern features users expect:
If you try out the extension, please report back how it worked for you to help us ensure it's ready for prime time.
*LExIM stands for "Leap by Extension, Iterate by Month" and it's how major new features are introduced to CiviCRM.