ongoingcallpage: fix vertical layout

Change-Id: I695b1c737c4bd08a8352176877f0ec2797a36c24

src/app/mainview/components/OngoingCallPage.qml

@@ -119,7 +119,7 @@ Rectangle {
         }
     }
 
-    JamiSplitView {
+    SplitView {
         id: mainColumnLayout
 
         anchors.fill: parent
@@ -127,6 +127,12 @@ Rectangle {
         property bool isHorizontal: false // Calculated when showing the stack view
         orientation: isHorizontal ? Qt.Horizontal : Qt.Vertical
 
+        handle: Rectangle {
+            implicitWidth: isHorizontal ? JamiTheme.splitViewHandlePreferredWidth : root.width
+            implicitHeight: isHorizontal ? root.height : JamiTheme.splitViewHandlePreferredWidth
+            color: SplitHandle.pressed ? JamiTheme.pressColor : (SplitHandle.hovered ? JamiTheme.hoverColor : JamiTheme.tabbarBorderColor)
+        }
+
         Rectangle {
             id: callPageMainRect