fix(tile-view): back to single click to pin

Undoes the logic added in:
ebcde745ef

modules/UI/shared_video/SharedVideoThumb.js

     this.updateDisplayName();
 
     this.container.onclick = this._onContainerClick;
-    this.container.ondblclick = this._onContainerDoubleClick;
 }
 SharedVideoThumb.prototype = Object.create(SmallVideo.prototype);
 SharedVideoThumb.prototype.constructor = SharedVideoThumb;

modules/UI/videolayout/LocalVideo.js

     this.updateIndicators();
 
     this.container.onclick = this._onContainerClick;
-    this.container.ondblclick = this._onContainerDoubleClick;
 }
 
 LocalVideo.prototype = Object.create(SmallVideo.prototype);

modules/UI/videolayout/RemoteVideo.js

     this._stopRemoteControl = this._stopRemoteControl.bind(this);
 
     this.container.onclick = this._onContainerClick;
-    this.container.ondblclick = this._onContainerDoubleClick;
 }
 
 RemoteVideo.prototype = Object.create(SmallVideo.prototype);

modules/UI/videolayout/SmallVideo.js

     this.updateView = this.updateView.bind(this);
 
     this._onContainerClick = this._onContainerClick.bind(this);
-    this._onContainerDoubleClick = this._onContainerDoubleClick.bind(this);
 }
 
 /**
     );
 };
 
-/**
- * Callback invoked when the thumbnail is double clicked. Will pin the
- * participant if in tile view.
- *
- * @param {MouseEvent} event - The click event to intercept.
- * @private
- * @returns {void}
- */
-SmallVideo.prototype._onContainerDoubleClick = function(event) {
-    if (this._pinningRequiresDoubleClick() && this._shouldTriggerPin(event)) {
-        APP.store.dispatch(pinParticipant(this.id));
-    }
-};
-
 /**
  * Callback invoked when the thumbnail is clicked and potentially trigger
  * pinning of the participant.
  * @returns {void}
  */
 SmallVideo.prototype._onContainerClick = function(event) {
-    const triggerPin = this._shouldTriggerPin(event)
-        && !this._pinningRequiresDoubleClick();
+    const triggerPin = this._shouldTriggerPin(event);
 
     if (event.stopPropagation && triggerPin) {
         event.stopPropagation();
     APP.store.dispatch(pinParticipant(participantIdToPin));
 };
 
-/**
- * Returns whether or not clicking to pin the participant needs to be a double
- * click instead of a single click.
- *
- * @private
- * @returns {boolean}
- */
-SmallVideo.prototype._pinningRequiresDoubleClick = function() {
-    return shouldDisplayTileView(APP.store.getState());
-};
-
 /**
  * Removes the React element responsible for showing connection status, dominant
  * speaker, and raised hand icons.