YouTube link unfurling was not working for a couple reasons.
There were two main parts fixed:
1. QML context for messages pertaining to linkUrls and imageUrls was changed from implicit to explicit. By this, I mean that any time we referenced linkUrls/imageUrls, we were relying on the knowledge that those values would be populated by some parent context several levels up. Now, we are referring to properties that have been explicitly defined on the components. This offers the ability to reuse components, and makes reading the code and debugging much easier.
2. Error handling has been added to getting link preview data. An unhandled "error" was thrown each time a link that wasn't whitelisted was passed in, causing the app to crash. For example, when a link to a tenor gif was posted in the chat, that URL was not whitelisted, causing the app to crash.
In timeline status update messages we want to render the ENS name next to a
local nickname in case it exists. This commit extends the `UsernameLabel` to do
just that.
Closes#1488
This is done because there's gonna be a case where this connection causes errors
because the component expects `NormalMessage` to be a parent of this component.
When used in future StatusUpdates, there's no `NormalMessage`. Unfortunately,
disabling the connection based on a condition doesn't remove the error, so we have
to move this code out entirely
