🎉 Bind K and J to emoji picker

[albinekb]

Fix #4

Two potential improvements:

• Key::Char('k') will only match lowercase k, so if you have caps lock on you can't navigate, feature or bug? 🤔
• Should i make up/down selected a function and share it between all the keys that do the same thing or is this good enough?

Both are fixed 👍

[LinusU]

Awesome 👏

How about adding two lines more, with Key::Char('K') and Key::Char('L')?

[LinusU]

Perfect!