Feed Failure Dialog keeps opening

If the feed fails to load it looks like the application keeps trying to load the feed (because of auto update). This just stacks feed failure dialogs on top of each other. When a feed fails to load,

• auto update should be disabled
• an action should be added to the dialog to re-try to load the feed (this would close the currently open dialog)

Ensure that only one dialog is open at a time. This is already being handled for feed-warning dialog.