I added an icon to the read marker (to help distinguish it from
text-heavy chat rooms), and fixed up the padding. I also find myself
reaching to right-click rooms often to mark them as read, so why not do
this from the read marker itself?
This introduces a new NeoChatDateTime object that wraps a QDateTime. The intent is that it can be passed to QML and has a series of functions that format the QDateTime into the various string representations we need.
This means we only have to send the single object to QML and then the correct string can be grabbed from there, simplifying the backend. It is also easy to add a new representation if needed as a function with a QString output and Q_PROPERTY can be added and then it will be available.
There are 2 main reason for doing this:
1. Because I can, I wanted to see if I could do it
2. It gets rid of the janky qml re parenting stuff so should be faster.
Improve the behaviour of jump to last unread message. The view will now jump as high as possible if the last unread message isn't loaded. This at least triggers more items to load which will eventually get the user to the last unread message.
