[BUG] The tooltips are not displayed on the lock screen

[LavaHeron]

Cosmic-greeter version:
0.1.0172892078524.04~7366808 (Pop!_OS 24.04 LTS - COSMIC Alpha 3)

Issue/Bug description:
If no user is logged in, the field for user and password is displayed on the right and a clock on the left. There are buttons under the clock. If you hover the mouse pointer over the buttons, a tooltip is displayed (log out, restart, shut down...).

These tooltips are not displayed on the lock screen.

Steps to reproduce:
Press Super + Esc (lock screen) > hover the mouse pointer over a button > no tooltip is displayed

Expected behavior:
Show tooltips on the lock screen too.

Other notes: