feat(tray): spacing config

resources/config

@@ -26,6 +26,9 @@
     "sway/window": {
         "max-length": 50
     },
+    "tray": {
+        "spacing": 10
+    },
     "clock": {
         "format-alt": "{:%Y-%m-%d}"
     },

resources/style.css

@@ -93,4 +93,4 @@ window#waybar {
 
 #tray {
     background-color: #2980b9;
-}
+}