ui/ux: homogenizes parts of the ui

- makes chat messages selectable
- changes ui colors to the Ring blue shades
- attempts to resize the window appropriately at app start
- adds confirmation modals for removing converstations and contacts
- corrects and error in the debug logger
- corrects vcardutils not handling JPEGs

Change-Id: I2c8a63f9c18c734a25dfd61086b137143cdac659
Tuleap: #790
diff --git a/MainPage.xaml b/MainPage.xaml
index 82d91f3..d803ef7 100644
--- a/MainPage.xaml
+++ b/MainPage.xaml
@@ -84,7 +84,7 @@
                             <Grid   x:Name="_hamburgerButtonBar_"

                                     Canvas.ZIndex="0"

                                     Grid.Row="0"

-                                    Background="LightBlue"

+                                    Background="#3bc1d3"

                                     Width="320"

                                     HorizontalAlignment="Left">

                                 <Grid.ColumnDefinitions>