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.
This is another thing that enables us to view multiple rooms in a single
timeline. Specifically, this improves the experience in room search
going across room versions and getting a correct readOnly status (for
hiding certain hover actions.)
These are more common than we thought, good examples are pinned or
searched messages - which are not going to be in the room's history
unless you happen to have them loaded. But currently our message menu
infrastructure expects them to be, since its looked up by the room +
event ID.
To fix this is simple, we now move the job of finding the event to the
caller which may use a model instead. I didn't fix all existing
call-sites yet, mainly the message menu opening one since that was the
most obvious bug. But this opens up the door for other assumptions about
room history to be fixed too.
I had to do a bit of C++ re-jiggering in order to expose useful
functions to QML.
Title this adds a number of options for when messages should be automatically marked as read for the user to choose from.
{width=480 height=262}
Refactor TimelineView to make it more reliable and prepare for read marker choice. This is done by creating signalling from the mode when reset which can be used to move the scrollbar to the newest meassage.
Some of the spaghetti is also removed so there is no need for ChatBar and TimelineView to talk directly.
The code to mark messages as read if they are all visible after 10s has been removed infour of just marking as read on entry if all are visible. This is temporary until a follow up providing user options is finished (although it will be one of the options)
