qml: add borders around video expand panel

Signed-off-by: Pierre Lamot <pierre@videolabs.io>

modules/gui/qt/medialibrary/qml/VideoInfoExpandPanel.qml

@@ -41,9 +41,28 @@ Widgets.NavigableFocusScope {
 
         implicitHeight: contentLayout.implicitHeight + ( VLCStyle.margin_normal * 2 )
         width: parent.width
-        clip: true
         color: VLCStyle.colors.bgAlt
 
+        Rectangle {
+            anchors {
+                top: parent.top
+                left: parent.left
+                right: parent.right
+            }
+            color: VLCStyle.colors.buttonBorder
+            height: VLCStyle.expandDelegate_border
+        }
+
+        Rectangle {
+            anchors {
+                bottom: parent.bottom
+                left: parent.left
+                right: parent.right
+            }
+            color: VLCStyle.colors.buttonBorder
+            height: VLCStyle.expandDelegate_border
+        }
+
         RowLayout {
             id: contentLayout