Improve Visibility of Success Message in Invitation Popover

[Sohaib-Ahmed21]

When a user invites someone to join Zulip and then clicks on the invite button, a success message is displayed in a popover. However, the current placement of the success message at the top of the popover may not be easily visible to the user, making it unclear whether the invitation has been sent successfully. Currently it looks like this:

Screencast.from.02-11-2024.07.55.18.AM.webm

To improve this, consider adjusting the layout or position of the success message within the popover to ensure that it is prominently displayed and clearly notifies the user of the sent invitation.