fix: null setting when cancelling prompt

main.js

@@ -947,17 +947,20 @@ function editsetting(name)
 		if (type != "undefined")
 		{
 			value = prompt(name, value);
-			if (type == "number")
+			if (value !== null)
 			{
-				value = parseInt(value);
+				if (type == "number")
+				{
+					value = parseInt(value);
+				}
+				else if (type == "boolean")
+				{
+					value = value === "true";
+				}
+				settings[name] = value;
+				savesettings();
+				loadsettings();
 			}
-			else if (type == "boolean")
-			{
-				value = value === "true";
-			}
-			settings[name] = value;
-			savesettings();
-			loadsettings();
 		}
 	}
 }