Standardize notifications, some are covering taskbar widgets and other notifications

[RefinedSoftwareLLC]

Qubes OS version:

R4.0

Affected component(s):

dom0's notifications, dom0's taskbar widgets

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Steps to reproduce the behavior:

Reboot Qubes OS.
Notice two types of notifications.
One type is the smaller common ones.
The other type is larger, covering the taskbar widgets, covering the smaller notifications, has an [x] button.

Expected behavior:

All notifications should use the same GUI library and never cover the taskbar widgets or each other.

[RefinedSoftwareLLC]

[system whonix] x
Connected to Tor

This is the non-standard notification. It is fine that it is larger, but it needs to not overlap the taskbar nor other notifications.

[RefinedSoftwareLLC]

[system whonix] x
Connected to Tor

This is the non-standard notification. It is fine that it is larger, but it needs to not overlap the taskbar nor other notifications.