v0.5.1

Removed

• Remove back-navigation from which-key menu (backspace/arrow-left). Not part of Doom Emacs: use Esc to close and reopen
• Remove hint text from which-key footer

Fixed

• Fix which-key opening instantly when sidebar is visible but editor is focused — delay now only skipped when sidebar itself has focus.
• Restore sidebar focus after closing which-key when it was opened from the sidebar