Marina,
I have tried your work around from above in both Moodle 3.4.2+ and 3.5 and it just does not seem to function.
I tried all of the options you gave, I tried to change the themes but all to no avail.
It would be just so much easier if the developers at Moodle could reinstate what we had before. As one user commented, the situation was not as we users see it a bug. Only the Moodle developers thought of it that way. For us the situation was more of an unseen feature that Moodle had not thought about.
Either way, it is now causing many of us to put on hold any upgrade plans until we can find a sensible way to work around this.
By the way, if anyone has found a quick and easy way to get around this I would really appreciate it since we plan to launch a new course next Autumn semester, and this would have been a major part of the course, so I'm starting to get desperate.
Very best regards,
Paul