JamiIdentifier: fix reduction overflow

GitLab: #1146
Change-Id: Icafcded965e4517ffd01301ad6f11fbc9d404911

src/app/commoncomponents/JamiIdentifier.qml

@@ -33,7 +33,7 @@ Item {
     // Background rounded rectangle.
     Rectangle {
         id: outerRect
-        anchors.fill: parent
+        anchors.fill: columnLayout
         radius: 20
         color: JamiTheme.secondaryBackgroundColor
     }