Comment 16 for bug 1351024

A little more details in that the Mir landing in #158 was unrelated, it's the Qt Compositor landing (platform-api, unity8, and replacing qtubuntu/unity-mir with qtmir) that's responsible for the changed behavior.

Note that calendar date/time picker does not work perfectly on #157 either - you need to manually hide the keyboard to show the picker. But on #158 and onwards hiding the keyboard reveals only empty space.