Previously, events for which the sender, target (state_key) or remover
was missing from the room members would have their profile fetched
from network when registering the event into models.
This could cause very slow past events loading times for rooms, since
the event registering function (which contained the profile retrieval
directives) is run sequentially event-by-event.
Missing profiles are now lazy-loaded when events come into the
user's view in the QML timeline.
- Move out all shortcuts from their central file to the component they
actually belong to
- Get rid of DebugConsoleLoader and the multiple consoles handling mess,
have only one global console
Use native ListModel which require a lot of changes, but should be
much faster than the old way which exponentially slowed down to a crawl.
Also fix some popup bugs (leave/forget).
Not working yet: side pane keyboard controls, proper highlight,
room & member filtering, local echo replacement
Introduce a HmenuItemPopupSpawner component that takes care of reacting
to onTriggered signals and calling the utils.makePopup() function.
The combination of this new component used in HMenu to open a HPopup
now correctly takes and restore focus to the right element when closed.
