Fix mouse input

dist/preview release/babylon.max.js

@@ -35615,6 +35615,9 @@ var BABYLON;
                     previousMultiTouchPanPosition.isPinching = false;
                     twoFingerActivityCount = 0;
                     initialDistance = 0;
+                    if (p.event.pointerType !== "touch") {
+                        pointB = undefined; // Mouse and pen are mono pointer
+                    }
                     //would be better to use pointers.remove(evt.pointerId) for multitouch gestures, 
                     //but emptying completly pointers collection is required to fix a bug on iPhone : 
                     //when changing orientation while pinching camera, one pointer stay pressed forever if we don't release all pointers  

dist/preview release/customConfigurations/minimalGLTFViewer/babylon.max.js

@@ -35615,6 +35615,9 @@ var BABYLON;
                     previousMultiTouchPanPosition.isPinching = false;
                     twoFingerActivityCount = 0;
                     initialDistance = 0;
+                    if (p.event.pointerType !== "touch") {
+                        pointB = undefined; // Mouse and pen are mono pointer
+                    }
                     //would be better to use pointers.remove(evt.pointerId) for multitouch gestures, 
                     //but emptying completly pointers collection is required to fix a bug on iPhone : 
                     //when changing orientation while pinching camera, one pointer stay pressed forever if we don't release all pointers  

src/Cameras/Inputs/babylon.arcRotateCameraPointersInput.ts

@@ -97,6 +97,10 @@ module BABYLON {
                     twoFingerActivityCount = 0;
                     initialDistance = 0;
 
+                    if((<any>p.event).pointerType !== "touch") {
+                        pointB = undefined; // Mouse and pen are mono pointer
+                    }
+
                     //would be better to use pointers.remove(evt.pointerId) for multitouch gestures, 
                     //but emptying completly pointers collection is required to fix a bug on iPhone : 
                     //when changing orientation while pinching camera, one pointer stay pressed forever if we don't release all pointers