Fixes unintended side effects caused by #14684

Summary:
I had fixed this locally but hadn't updated the original pull request, sorry. This commit is working for us in production.
Closes #14900

Differential Revision: D5539787

Pulled By: hramos

fbshipit-source-id: 6c826ada4a7f36607c65508ced6c9dce32002f74

Libraries/Experimental/SwipeableRow/SwipeableRow.js

@@ -72,7 +72,6 @@ const SwipeableRow = createReactClass({
   propTypes: {
     children: PropTypes.any,
     isOpen: PropTypes.bool,
-    preventSwipeLeft: PropTypes.bool,
     preventSwipeRight: PropTypes.bool,
     maxSwipeDistance: PropTypes.number.isRequired,
     onOpen: PropTypes.func.isRequired,
@@ -110,7 +109,6 @@ const SwipeableRow = createReactClass({
   getDefaultProps(): Object {
     return {
       isOpen: false,
-      preventSwipeLeft: false,
       preventSwipeRight: false,
       maxSwipeDistance: 0,
       onOpen: emptyFunction,
@@ -339,12 +337,10 @@ const SwipeableRow = createReactClass({
 
   // Ignore swipes due to user's finger moving slightly when tapping
   _isValidSwipe(gestureState: Object): boolean {
-    if (this.props.preventSwipeLeft && gestureState.dx < 0) {
-      return false;
-    }
-    if (this.props.preventSwipeRight && gestureState.dx > 0) {
+    if (this.props.preventSwipeRight && this._previousLeft === CLOSED_LEFT_POSITION && gestureState.dx > 0) {
       return false;
     }
+
     return Math.abs(gestureState.dx) > HORIZONTAL_SWIPE_DISTANCE_THRESHOLD;
   },