Hi, thanks for providing and maintaining this nice tool!

My environment

I am using sway on Fedora Linux 38.

$ sway --version
sway version 1.8.1

I am using the i3keys on the current latest master branch 99e368e.

The issue summary

In sway, it's possible to define symbol keys as the name starting with a capital letter first such as Return, Space, Semicolon, Comma, Period, Slash. I can see these keys are not shown as occupied (red color) on the page by the i3keys web.

I don't see the capital letter first names worked in i3 config except "Return". But it's nice if i3keys considers the capital letter first key names.

I am using this sway config.
https://github.com/junaruga/framework-laptop-config/blob/main/home/.config/sway/config

set $mod Mod4
...
bindsym $mod+Return exec $term
...
bindsym $mod+Shift+Semicolon exec $term
...
# KEY_DELETE 111
bindsym $mod+Comma exec "sudo ydotool key 111:1 111:0"
# KEY_INSERT 110
bindsym $mod+Period exec "sudo ydotool key 110:1 110:0"
# KEY_ENTER 28
bindsym $mod+Slash exec "sudo ydotool key 28:1 28:0"
...
bindsym $mod+Semicolon mode "symbol"
bindsym $mod+Shift+Space mode "symbol"

I was able to see the following $mod+minus was shown as occupied.

bindsym $mod+minus scratchpad show

Here is the actual screenshot. You can see these capital letter first keys are not shown as occupied (red).