effects: Drop morphing popups effect
The effect does not work very well for two main reasons: Some clients will make a new popup rather than move an existing one, so whether it does anything is highly unpredictable as a user.
Popups can be of massively different sizes with different amounts of text. This means the text in the smaller popup gets resized which doesn't look like a natural in-between state of the two popups. This defeats the objective of looking smoother.
On top of that, it's rather glitchy. This effect was purely visual, no functionality changes.