UI: rearrange grid to fit debug panel properly

- rearranges the xaml to place the hamburger button inside the
splitview's pane above the smartpanel, allowing for the debug to
roll out on top

Change-Id: Ib61840d899e1ab22a397439b3a81ef494569370a
Tuleap: #1005

MainPage.xaml

@@ -23,13 +23,25 @@
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
       mc:Ignorable="d">
 
+    <Grid>
+        <SplitView x:Name="_outerSplitView_"
+                   IsPaneOpen="False">
+        <SplitView.Pane>
+            <Frame x:Name="_consolePanel_"/>
+        </SplitView.Pane>
+        <SplitView.Content>
+            <SplitView x:Name="_innerSplitView_"
+                       IsPaneOpen="True"
+                       CompactPaneLength="60"
+                       DisplayMode="CompactInline">
+                <SplitView.Pane>
                         <Grid>
                             <Grid.RowDefinitions>
                                 <RowDefinition Height="32"/>
                                 <RowDefinition Height="*"/>
                             </Grid.RowDefinitions>
                             <Grid   x:Name="_hamburgerButtonBar_"
-              Canvas.ZIndex="2"
+                                    Canvas.ZIndex="0"
                                     Grid.Row="0"
                                     Background="LightBlue"
                                     Width="320"
@@ -45,19 +57,10 @@
                                         HorizontalAlignment="Center"
                                         Style="{StaticResource HamburgerButtonStyle}"/>
                             </Grid>
-        <SplitView x:Name="_outerSplitView_"
-                   Grid.Row="1"
-                   IsPaneOpen="False">
-        <SplitView.Pane>
-            <Frame x:Name="_consolePanel_"/>
-        </SplitView.Pane>
-        <SplitView.Content>
-            <SplitView x:Name="_innerSplitView_"
-                       IsPaneOpen="True"
-                       CompactPaneLength="60"
-                       DisplayMode="CompactInline">
-                <SplitView.Pane>
-                    <Frame x:Name="_smartPanel_"/>
+                            <Frame x:Name="_smartPanel_"
+                                   Grid.Row="1">
+                            </Frame>
+                        </Grid>
                     </SplitView.Pane>
                 <SplitView.Content>
                         <Grid x:Name="_navGrid_">