Unlabeled button in "Devices" settings

1. Go to "Qt Creator" -> "Preferences..." -> "Devices".
2. Select an iOS Simulator device.
   You'll see a button without any label.
3. Select the Local PC.
   The button will get the label "Show Running Processes".
4. Select an iOS Device.
   The button will disappear.

Buttons should always have a label telling the user what it will do.