Added check, double-check and clock icons to message bubbles

I am sure this is a subject to change. But if anyone is interested you can check this, try this, add your comments etc. I've had very little time to work on this and most of the time I was just debugging what's broken.

Anyway, if eventually merged I am sure me and Rodney are going to be happy :D.

And at least with this we can now see if stickers have been sent or not as they do not have any background to change the background colour on.