[BUG] Widgets are always on top in KDE

Checklist before submitting an issue

• I have searched through the existing closed and open issues for eww and made sure this is not a duplicate
• I have specifically verified that this bug is not a common user error
• I am providing as much relevant information as I am able to in this bug report (Minimal config to reproduce the issue for example, if applicable)

Description of the bug

I am not sure if this is meant to be, but widgets always draw above any of my windows and make the area un-clickable.

Reproducing the issue

Just start some widget.

This is my config:

(defpoll packages :interval "1h" "./scripts/get-packages -a")

(defwidget neofetchWidget []
  (box :orientation "v"
    :halign "center"
    :valign "center"
    
    (box :orientation "h";
      (box :orientation "v" :class "neofetch-symbols" :spacing 5;
        
        (label :class "os-label" :halign "end" :text "")
        (label :class "wm-label" :halign "end" :text "")
        (label :class "packages-label" :halign "end" :text "")
        (label :class "terminal-label" :halign "end" :text "")
        (label :class "uptime-label" :halign "end" :text ""))
      
      (box :orientation "v" :class "neofetch-information" :spacing 5;
        (label :class "os-label" :halign "end" :text "")
        (label :class "wm-label" :halign "end" :text "")
        (label :class "packages-label" :halign "end" :text "$packages")
        (label :class "terminal-label" :halign "end" :text "")
        (label :class "uptime-label" :halign "end" :text "")))))

(defwindow sidebar 
  :monitor 0
  :windowtype "dock"
  :wm-ignore true 
  :geometry (geometry :x "50px" :y "500px" :width "200px" :height "150px" :anchor "top left")
  (neofetchWidget))

Expected behaviour

The widgets get drawn "in the background" behind all windows.

Additional context

• system: "x86_64-linux"
• host os: Linux 5.10.93, NixOS, 21.11 (Porcupine)
• eww version: 0.2.0
• DE: Plasma 5.23.3
• WM: KWin