Fix bugs in state delegates

- Don't show a dot over profile pictures.
  The dot was intended to be part of the Avatar when there is no image and the Avatar is too small to show an icon.
  Currently, it is visible over the profile picture. If we still want the dot, it should be upstreamed

- Fix avatar images in StateComponent

src/qml/StateComponent.qml

@@ -55,18 +55,10 @@ RowLayout {
         Layout.preferredWidth: Kirigami.Units.iconSizes.small
         Layout.preferredHeight: Kirigami.Units.iconSizes.small
 
-        source: root.author?.avatarUrl ?? ""
+        source: root.author?.avatarSource ?? ""
         name: root.author?.displayName ?? ""
         color: root.author?.color ?? undefined
 
-        Rectangle {
-            radius: height
-            height: 4
-            width: 4
-            color: root.author.color
-            anchors.centerIn: parent
-        }
-
         MouseArea {
             anchors.fill: parent
             cursorShape: Qt.PointingHandCursor

src/qml/StateDelegate.qml

@@ -110,14 +110,6 @@ TimelineDelegate {
                             name: parent.modelData.displayName
                             source: parent.modelData.avatarSource
                             color: parent.modelData.color
-
-                            Rectangle {
-                                radius: height
-                                height: 4
-                                width: 4
-                                color: avatarDelegate.modelData.color
-                                anchors.centerIn: parent
-                            }
                         }
                     }
                 }