Move thin scrollbars to show only after scrolling has started and not on touchstart.

In the new iOS 13 when clicking some element inside igScroll's content it cancels transitions too fast for the scrollbar animations and causes native events instability.

Author: skrustev

src/js/modules/infragistics.ui.scroll.js

@@ -2421,8 +2421,6 @@
 			this._offsetDirection = 0;
 
 			this._igScollTouchPrevented = false;
-
-			this._showScrollbars(true);
 		},
 
 		_onTouchMoveContainer: function (event) {
@@ -2510,11 +2508,12 @@
 			}
 
 			if (scrolledXY.x === 0 && scrolledXY.y === 0) {
-			    this._igScollTouchPrevented = true;
+				this._igScollTouchPrevented = true;
 			}
 
 			//On Safari preventing the touchmove would prevent default page scroll behaviour even if there is the element doesn't have overflow
 			if (!this._igScollTouchPrevented && event.cancelable) {
+				this._showScrollbars(true);
 				event.preventDefault();
 			}
 		},