Turn to Grid pannel from information page, doulbe-click [Back] button will cause picture to disappear in grid pannel and still display in information pannel of another picture.

Reproduction Steps:
1. launch qmlviewer then execute flickr.qml file
2. wait network to download pictures
3. select any picture to transfer to information pannel
4. double-click quickly [Back] button

Expected Result:
the selected picture is shown correctly in original grid pannel

Actual Result:
the selected picture disappears in grid pannel

Trace More: select another picture to show its information pannel, the selected image before still displays in the same information pannel.