Add blank space Super+Space i3 keybind

i3.nix

@@ -69,6 +69,7 @@ in {
       keybindings = lib.mkOptionDefault {
         "${mod}+Return" = "exec kitty";
         "${mod}+Shift+e" = "exec i3-msg exit"; # bypass default session exit confirmation menu
+        "${mod}+space" = "exec i3-msg open"; # Open blank space
         "Mod1+Q" = "exec /etc/profiles/per-user/elnu/bin/rofi-power";
 
         # Audio controls