Added filters for notifications and system tray items. (#234)

* Added filters for notifications and systray. closes #233

* Add links to documentation.

globals/mousePos.ts

@@ -1,3 +1,5 @@
-const globalMousePosVar = Variable([0, 0]);
+import { Variable as VariableType } from "types/variable";
+
+const globalMousePosVar: VariableType<number[]> = Variable([0, 0]);
 
 globalThis["globalMousePos"] = globalMousePosVar;