Large mouse events refactoring and cleanup

js/input/UZoom.js

@@ -0,0 +1,9 @@
+import UMouseWheel from "./UMouseWheel";
+
+export default class UZoom extends UMouseWheel {
+    wheel(variation, location) {
+        let zoomLevel = this.blueprint.getZoom()
+        zoomLevel -= variation
+        this.blueprint.setZoom(zoomLevel, location)
+    }
+}