**Do you want to request a *feature* or report a *bug*?**
Bug

**What is the current behavior?**
After an `onDrop` event has fired inside an "editable" element (input, textarea, contentEditable), the `onSelect` event on that element will no longer fire when changing selection using the keyboard. 

As you can see in this gif below, the onSelect event gets called each time I move the cursor around (using the arrow keys). But once the `onDrop` event has fired, `onSelect` will no longer fire when I move the cursor around (also using the keys):

![react-onselect-bug](https://user-images.githubusercontent.com/3599069/32080216-bd42f580-baae-11e7-98ee-93a482ed80ca.gif)

[Here's the jsfiddle](https://jsfiddle.net/owmL8n6u/1/) I used to record the video above.

**What is the expected behavior?**
The `onSelect` event should always fire when selection changes.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
React 16 / Chrome 62
targetInst,
    nativeEvent,
    nativeEventTarget,
  ) {
    const doc = getEventTargetDocument(nativeEventTarget);
    
    
    if (!doc || !isListeningToAllDependencies('onSelect', doc)) {
      return null;
    }
    const targetNode = targetInst ? getNodeFromInstance(targetInst) : window;
    switch (topLevelType) {
      
      case TOP_FOCUS:
        if (
          isTextInputElement(targetNode) ||
          targetNode.contentEditable === 'true'
        ) {
          activeElement = targetNode;
          activeElementInst = targetInst;
          lastSelection = null;
        }
        break;
      case TOP_BLUR:
        activeElement = null;
        activeElementInst = null;
        lastSelection = null;
        break;