UserAgent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36

Steps to reproduce the problem:
1. Click menu (three vertical dots)
2. Place pointer over "History"
3. Note the words "Recently closed" in the list appearing to the left.

What is the expected behavior?

What went wrong?
Note how the words "Recently closed" appear frustratingly the same as
the items beneath them.

There is merely a different icon distinguishing it.

The user thinks it is just the first item in a list of items. (He might
even try to click on it, to no avail.)

But it is not! It is the header of a list of items below it!

The same for the first item in each group of devices that one sees
there.

Please use a new format, clearly distinguishing titles of groups and
their members!

Did this work before? N/A 

Chrome version: 56.0.2924.76  Channel: stable
OS Version: 
Flash Version: