Update Checker

[avj]

I don't know if this will be an issue with new users, but I suspect it might. If you have held packages they still show up as available updates this is also true with the control center, and will likely have new users confused as to why they can't install their updates, just my opinion.  On a side note it might be useful to be able to set a specific time for checking for updates like once a day at 7:00 am. This will work better for people with limited bandwidth at certain hours. Again just my opinion, everything seems to work fine have not noticed any issues.  Good work.