Comment 5 for bug 1368346

This is very similar to the fixed bug 1362127, and also to a problem I observed in <https://code.launchpad.net/~unity-api-team/ubuntu-system-settings/apneditor/+merge/227534/comments/569187>. It seems to be a common problem when buttons are anchored to the top of the OSK: whatever is above the buttons slides underneath when it shouldn't.