Collection of moderation fixes (#4566)

* Fix: dont blur parents in threads that embed blocks

* After tapping 'Show hidden replies', show the individual hider cards

* Add shape override to UserAvatar and fix the fallback avi for labelers

* Fix precedence

* Detect shape for DefaultAvatar

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Co-authored-by: Dan Abramov <dan.abramov@gmail.com>

src/components/moderation/PostAlerts.tsx

@@ -92,6 +92,8 @@ function PostLabel({
               <UserAvatar
                 avatar={desc.sourceAvi}
                 size={size === 'large' ? 16 : 12}
+                type="labeler"
+                shape="circle"
               />
             ) : (
               <desc.icon size="sm" fill={t.atoms.text_contrast_medium.color} />