Popover is too wide

## What Happened

The calendar popover is too wide. I'm not sure if this is the intended behaviour or ~~if it is a side effect of the sound indicator showing devices long name. See https://github.com/elementary/wingpanel-indicator-sound/issues/190~~


## Expected Behavior

If the change was unintentional, I'd expect it to look like it looked before.

## Platform Information

elementary OS 6

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