Some of the changes are a bit unreadable because the previous files were not
saved with the project's linter / auto-formatter settings applied. But it's
basically:
* For icons that are not Mantine-native components, use the rem() function
for computing their size, so they scale correctly with the root font size.
See https://mantine.dev/styles/rem/.
* Try a different icon for the notifications tray, since the bell icon was
already used for Prometheus alerts. Other candidates from
https://tabler.io/icons would be IconExclamationCircle or
IconDeviceDesktopExclamation or IconMessageCircleExclamation.
* The server startup alert looked a bit cramped, introduced a Stack to add
spacing between the text and the progress bar.
* Added a bit of spacing between notification text and date. Things looked
cramped. To make things look ok with that, I also top-aligned the
notification text and icon.
Signed-off-by: Julius Volz <julius.volz@gmail.com>
