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When the IDE detects that there's something available on the update center, a green, refresh type of icon showsn on the IDE's status bar at the bottom. It would be greatly helpful, if the icon has a a tooltip like 'New Updates available on the Update center, click to download/install' Similarly a tooltip for the red x icon when cannot connect to the update center should be provided.
I believe the icon on the status bar indicating available updates has a tooltip now.