Filter touch events not to be handled.

In IE 10/11, MSPointer event is fired by mouse. It shouldn't be handled.

Also, Exception has occurred with event.targetTouches, and this commit
fixed it too.

src/perfect-scrollbar.js

@@ -544,6 +544,7 @@
         var speed = {};
         var breakingProcess = null;
         var inGlobalTouch = false;
+        var inLocalTouch = false;
 
         function globalTouchStart(e) {
           inGlobalTouch = true;
@@ -560,7 +561,20 @@
             return e.originalEvent;
           }
         }
+        function shouldHandle(e) {
+          var event = e.originalEvent;
+          if (event.targetTouches && event.targetTouches.length === 1) {
+            return true;
+          }
+          if (event.pointerType && event.pointerType !== 'mouse') {
+            return true;
+          }
+          return false;
+        }
         function touchStart(e) {
+          if (shouldHandle(e)) {
+            inLocalTouch = true;
+
             var touch = getTouch(e);
 
             startOffset.pageX = touch.pageX;
@@ -575,8 +589,9 @@
             e.stopPropagation();
             e.preventDefault();
           }
+        }
         function touchMove(e) {
-          if (!inGlobalTouch && e.originalEvent.targetTouches.length === 1) {
+          if (!inGlobalTouch && inLocalTouch && shouldHandle(e)) {
             var touch = getTouch(e);
 
             var currentOffset = {pageX: touch.pageX, pageY: touch.pageY};
@@ -601,6 +616,9 @@
           }
         }
         function touchEnd(e) {
+          if (!inGlobalTouch && inLocalTouch) {
+            inLocalTouch = false;
+
             clearInterval(breakingProcess);
             breakingProcess = setInterval(function () {
               if (Math.abs(speed.x) < 0.01 && Math.abs(speed.y) < 0.01) {
@@ -614,6 +632,7 @@
               speed.y *= 0.8;
             }, 10);
           }
+        }
 
         if (supportsTouch) {
           $(window).bind("touchstart" + eventClassName, globalTouchStart);