This fixes two minor inconveniences:
- When closing the chat window and re-showing it from the systray icon, the geometry was not properly restored. The window was always shown in the middle of the screen. Now, one gets the window back with it's actual last position and size.
- It is now possible to not only show the window from the systray icon, but also to close it. This is the way other chat programs do it (Kopete back in the day, Konversation, Quassel IRC etc.)
Make sure that the image container has it's implicit width/height set so that the correct size can always be calculated. This was breaking images that were a reply to another message (not sure if that's legal because we don't allow but other clients do because I found one).
In some cases (where we don't get a thumbnail) we load the entire image,
which might be large. Even when we get a thumbnail, the smoothing we
apply doesn't get the best results and the only other option is
mipmapping which is more memory intensive - it stores progressively
smaller images but keeps all of them in memory.
Now the ImageDelegate sets the sourceSize, which helps reduce the memory
footprint (since Qt will throw away whatever parts of the image we don't
need) and makes the images look smoother when scaled. However,
AnimatedImages do not support this so this change introduces a new
property to tell if the image could possibly be animated. It will
erroneously pick up formats that could support animation (e.g. WebP) but
other image formats will still benefit so it's a net positive. The
ImageDelegate will load the correct image component depending on this
property.
When auto-completing rooms, there may be some that do not have
canonical addresses (e.g. 1-to-1 chats). These can't be linked anyway,
so skip them and any other unlinkable entries.
The correct render hint is actually SmoothPixmapTransform, as
Antialiasing only matters for primitives. Also, render a white
background for potentially transparent avatars.
