Fix avatar sizes in room list

Small binding loop still exists when fading the room name

qml/pages/MainView.qml

@@ -152,7 +152,9 @@ Page {
                 Image {
                     id: roomImage
 
-                    height: parent.height
+                    Layout.alignment: Qt.AlignVCenter | Qt.AlignRight
+
+                    height: 2 * Theme.fontSizeMedium
                     width: height
                     sourceSize.width: height
                     sourceSize.height: height