StatusBarI3: Remove null from JSON

Program.cs

@@ -29,6 +29,21 @@ namespace i3csstatus {
 			return kill(p.Id, sig);
 		}
 	}
+	static class JsonExtended
+	{
+		public static JsonObject RemoveNull(this JsonObject o)
+		{
+			List<string> toDelete = new();
+			foreach(var (k, v) in o)
+			{
+				if(v == null)
+					toDelete.Add(k);
+			}
+			foreach(var k in toDelete)
+				o.Remove(k);
+			return o;
+		}
+	}
 	static class ColorToHexExtended
 	{
 		static public string ToHex(this Color c)
@@ -348,7 +363,7 @@ namespace i3csstatus {
 				["full_text"] = e.text,
 				["short_text"] = e.short_text,
 				["color"] = e.color?.ToHex(),
-			}).ToArray());
+			}.RemoveNull()).ToArray());
 			var opt = new JsonSerializerOptions();
 			opt.DefaultIgnoreCondition =  System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull;
 			w.Write(",");