settingsview: redesign UI

Gitlab: #3
Change-Id: I382bc51b78cb5aff45e7dad008c97368494780d8
diff --git a/src/mainview/MainView.qml b/src/mainview/MainView.qml
index aa9dcec..1e6b422 100644
--- a/src/mainview/MainView.qml
+++ b/src/mainview/MainView.qml
@@ -249,7 +249,7 @@
             handle: Rectangle {
                 implicitWidth: JamiTheme.splitViewHandlePreferredWidth
                 implicitHeight: splitView.height
-                color:"transparent"
+                color:"white"
                 Rectangle {
                     implicitWidth: 1
                     implicitHeight: splitView.height