internal : enables NavigationCacheMode for every pages

Change-Id: Icebbdf308a1aa8443e4f9d4f67579712a4298a84
Tuleap: #1241

LoadingPage.xaml

@@ -21,6 +21,7 @@
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    NavigationCacheMode="Enabled"
       mc:Ignorable="d">
 
     <Grid>

MainPage.xaml

@@ -22,6 +22,7 @@
       xmlns:local="using:RingClientUWP"
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+      NavigationCacheMode="Enabled"
       mc:Ignorable="d">
 
     <Page.Resources>

MessageTextPage.xaml

@@ -7,6 +7,7 @@
     xmlns:ctl="using:RingClientUWP.Controls"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    NavigationCacheMode="Enabled"
     mc:Ignorable="d">
 
     <Page.Resources>

RingConsolePanel.xaml

@@ -21,6 +21,7 @@
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    NavigationCacheMode="Enabled"
       mc:Ignorable="d">
 
     <Grid x:Name="_debugWindowOutputGrid_">

SmartPanel.xaml

@@ -24,6 +24,7 @@
       xmlns:views="using:RingClientUWP.Views"
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+      NavigationCacheMode="Enabled"
       mc:Ignorable="d">
 
     <Page.Resources>

WelcomePage.xaml

@@ -21,6 +21,7 @@
       xmlns:local="using:RingClientUWP"
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+      NavigationCacheMode="Enabled"
       mc:Ignorable="d">
 
     <Grid x:Name="_welcomePage_"

Wizard.xaml

@@ -5,6 +5,7 @@
     xmlns:local="using:RingClientUWP"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    NavigationCacheMode="Enabled"
     mc:Ignorable="d">
 
     <Grid>