qml/RoomDrawer: Add & fix separators

A separator has been added to the drawer view's left side, and the position of the NavigationTabBar has been set so it correctly draws the separator at the top and not the bottom.

src/qml/RoomDrawer.qml

@@ -81,7 +81,14 @@ Kirigami.OverlayDrawer {
         id: loader
         active: root.drawerOpen
 
-        sourceComponent: ColumnLayout {
+        sourceComponent: RowLayout {
+            spacing: 0
+
+            Kirigami.Separator {
+                Layout.fillHeight: true
+            }
+
+            ColumnLayout {
                 spacing: 0
 
                 Component.onCompleted: infoAction.toggle()
@@ -145,6 +152,8 @@ Kirigami.OverlayDrawer {
                     Kirigami.Theme.colorSet: Kirigami.Theme.Window
                     Kirigami.Theme.inherit: false
 
+                    position: QQC2.ToolBar.Footer
+
                     actions: [
                         Kirigami.Action {
                             id: infoAction
@@ -162,3 +171,4 @@ Kirigami.OverlayDrawer {
             }
         }
     }
+}