Add try catch for runtime exception to stop sending requests while user is not signed in.
Move catch exception to MainView, so that the actionListener only runs when networkConfiguration is not null
Changes to overviewPanel
-Removed the refresh button as the table auto-refreshes
-The table now fills the tab completely regardless of window size
-The table no longer displays ID (per Marty's preference)
Committed by irshusdock
Merge release with overviewTab