#608 WebUpdate list isn't changed after installation

[seaktf]

After we've chosen some updates/packages from the
"Available updates list" and downloaded and installed
them, they are still shown in the list We have to
"Close" the window and reopen it again to have things
reflected correctly.

Maybe there're some technical difficulties that it's
impossible to overcome right now. If that's the case,
I'd like to suggest two solutions:

1. In the message window after installation, tell users
   to close the WebUpdate window and reopen again to make
   it reflect the real situation.
2. Clear the whole to force user to click "Check for
   updates" again.

Regards,

Seak