applet/notifications: remove transitions to prevent UI glitches
This patch is a workaround for BUG-427894.
The transitions seem to cause erratic behavior when interacting with the "Show %1 More" / "Show fewer" buttons in the notification. This causes two types of glitches:
- A purely visual glitch when expanding the notifications, leaving behind a gap in the former position of the button:
- A functional glitch when collapsing the notifications, which causes the "Show %1 More" button to overlap with the title of the next navigation, often times preventing said button from being clicked altogether:
This patch completely removes any visual transitions in the notification history, which also eliminates this "glitchy" behavior. Before re-adding transitions in the future, I would suggest to make sure they do not cause any unwanted side effects.