bug: In Firefox, "Start a private chat" is always with hover style

[gustavotrott]

Describe the bug
In Firefox, when a moderator click on some user, the "Start a private chat" option is always with hover style applied.

To Reproduce
Steps to reproduce the behavior:

1. Start a meeting
2. Moderator join (using Firefox)
3. Viewer join
4. Moderator click on the user name (in the user list)
5. Move the cursor for some option that is not "Start a private chat"

Expected behavior
"Start a private chat" option should lose the blue background

Actual behavior
"Start a private chat" option have a blue background, as if cursor was hover it

Screenshots

BBB version:
BigBlueButton Server 2.5-alpha-5 (112)

Desktop (please complete the following information):

• OS: Linux Ubuntu 20.04
• Browser Firefox
• Version 98.0.1 (64-bit)

Additional context
Add any other context about the problem here.

[gustavotrott]

Actually it is happening in all popovers.. and also in 2.4.