Issues with recent update

[KeeJef]

Reported by a couple of people after the recent release

• When the magnifying glass is pressed next to the nodes the app freezes for a second before finally continuing to the node screen
• When pressing on a node from the wallet screen a large circle is rendered and then the node flashes for a few seconds before finally refreshing
• We should also do a refresh of the node list as some have been reported as being down
• When opening the wallet after it has been in the background for a blank a white screen can sometimes be shown for 3-5 seconds before the wallet screen becomes accessible