Deinstalling XARs via the PackageManager is broken in IE8

[windauer]

Deinstalling XARs in the PackageManager fails in IE8 on Windows XP. The issue has somehow to do with hiding of the dialogs.

To reproduce the error:

1. Open the Package Manager
2. select the XAR package you want to uninstall and click the uninstall button
3. in the upcoming dialog either click "Yes" or "No", the dashboard fails in both cases since the problem is not the uninstalling but hiding the dialog

The IE8 error message is:

• exception in animation handler for: onEnd
• Error: Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus. {...}

For testing reasons I removed the two calls

• dialog.hide();
• dialog.destroyRecursive();

from util.js. Afterwars uninstalling XARs works fine (but for sure the dialog does not close anymore).

[windauer]

I created a Hotfix/IE8 branch. I will push all IE8 related changes there until it's not stable