Some options are hard to access from the container list

[Cuervino]

It's rather difficult to find where are hidden some features (such as the "Hide this container").
For instance, some people never found out the features: https://support.mozilla.org/en-US/questions/1279698

The reason is that when an user access to the list of containers, he doesn't realize that some options are hidden on the right area of the line.

Proposal : make a better distinction between the 2 areas, when hovering them.

[lesleyjanenorton]

+1 - I discovered this only by accident