[macos] Fixed cursor shifting after drag gesture

When redisplaying the mouse cursor after a modified drag gesture, incorporate the conversion from view coordinates to window coordinates. Previously, this code performed the conversion but threw away the results.

Fixes #8670.

platform/macos/CHANGELOG.md

@@ -33,6 +33,7 @@ This version of the Mapbox macOS SDK corresponds to version 3.6.0 of the Mapbox
 ### User interaction
 
 * Fixed an issue causing the map to go blank during a flight animation that travels a very short distance. ([#9199](https://github.com/mapbox/mapbox-gl-native/pull/9199))
+* Fixed an issue causing the mouse cursor to jump after Shift- or Option-dragging the map. ([#9390](https://github.com/mapbox/mapbox-gl-native/pull/9390))
 * The Improve This Map button in the attribution action sheet now leads to a feedback tool that matches MGLMapView’s rotation and pitch. `-[MGLAttributionInfo feedbackURLAtCenterCoordinate:zoomLevel:]` no longer respects the feedback URL specified in TileJSON. ([#9078](https://github.com/mapbox/mapbox-gl-native/pull/9078))
 
 ### Other changes

platform/macos/src/MGLMapView.mm

@@ -1369,7 +1369,7 @@ public:
             // Move the cursor back to the start point and show it again, creating
             // the illusion that it has stayed in place during the entire gesture.
             CGPoint cursorPoint = [self convertPoint:startPoint toView:nil];
-            cursorPoint = [self.window convertRectToScreen:{ startPoint, NSZeroSize }].origin;
+            cursorPoint = [self.window convertRectToScreen:{ cursorPoint, NSZeroSize }].origin;
             cursorPoint.y = self.window.screen.frame.size.height - cursorPoint.y;
             CGDisplayMoveCursorToPoint(kCGDirectMainDisplay, cursorPoint);
             CGDisplayShowCursor(kCGDirectMainDisplay);