Update WorldBrowserPage.vue

Changed how rotation angle of the object is calculated to be consistent with beaming. This gets rid of the angle being slightly off when beaming to the object and dropping another one.

Author: SalleeMatthew

spa/src/pages/world-browser/WorldBrowserPage.vue

@@ -308,7 +308,7 @@ export default Vue.extend({
           x: dropRotation._value.x_,
           y: dropRotation._value.y_,
           z: dropRotation._value.z_,
-          angle: dropRotation._value.angle + 3.15,
+          angle: dropRotation._value.angle + Math.PI,
         },
       });
       this.sharedObjects.push(request.data.object_instance);