Chat app: Fix images not loading #1901
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When images load they are not shown in the chat app as it does not seem to redraw the message automatically.
This PR prompts the TextEdit component to refresh its content once the first image in the message loads.
Known issue: This will not ensure all images in a message will show, only the first; if others have loaded by that point then it'll show those too.
I am aware the chat app has a rewrite which will replace it. I'm happy enough to see this replaced, and if the new chat needs this fix too I think we can put a bit more effort in for the new app to show multiple images.