Often, I will have a long running thread/message-reply chain open, and then a certain channel open for other conversations. It would be great to have a keyboard shortcut to jump to the input for the sidebar, just like there is the equivalent "Focus Input" shortcut (Shift + GUI + L) that jumps to the input for the current channel.

With that, I could easily jump between both places to add new messages without having to switch to my mouse/trackpad.