Added ConnectionFailedMessage, Placeholder for Username,Chat,ChatsList

PolyChat/Views/ConnectionFailedDialog.xaml

@@ -0,0 +1,17 @@
+<ContentDialog x:Class="PolyChat.Views.ConnectionFailedDialog"
+               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+               xmlns:local="using:PolyChat.Views"
+               xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+               x:Name="MessageDialog"
+               Title="Connection Failed"
+               PrimaryButtonText="Retry"
+               SecondaryButtonText="Abort"
+               mc:Ignorable="d">
+
+    <StackPanel>
+        <TextBlock Text="Message:" Foreground="{ThemeResource SystemColorDisabledTextColor}" Margin="0 0 0 8"/>
+        <TextBlock x:Name="textError" Foreground="{ThemeResource SystemErrorTextColor}"/>
+    </StackPanel>
+</ContentDialog>