Use raw mouse input in free flight mode (#763)

* Use raw mouse input in free flight mode

* Add fallback in case raw mouse input is not supported

Author: Macil

common/webapp/src/js/controls/freeflight/FreeFlightControls.js

@@ -152,7 +152,17 @@ export class FreeFlightControls {
 
         document.body.requestFullscreen()
             .finally(() => {
-                this.target.requestPointerLock();
+                // try with unadjustedMovement first and fall back without it if not supported
+                this.target.requestPointerLock({
+                    unadjustedMovement: true
+                })
+                .catch(err => {
+                    if (err.name === "NotSupportedError") {
+                        return this.target.requestPointerLock();
+                    } else {
+                        throw err;
+                    }
+                });
             });
     }