Fixed the display date of the calendar items. Created test project for core library, included tests for recurring calendar events.

Wino.Mail.WinUI/Styles/WinoCalendarResources.xaml

@@ -2,6 +2,7 @@
     x:Class="Wino.Styles.WinoCalendarResources"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:calendar="using:Wino.Mail.WinUI.Controls.Calendar"
     xmlns:controls="using:Wino.Calendar.Controls"
     xmlns:controls2="using:Wino.Mail.WinUI.Controls"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
@@ -54,7 +55,6 @@
     <!--  Horizontal template  -->
     <DataTemplate x:Key="FlipTemplate" x:DataType="models:DayRangeRenderModel">
         <Grid
-            x:Name="RootGrid"
             Background="Transparent"
             ColumnSpacing="0"
             RowSpacing="0">
@@ -63,6 +63,7 @@
                 <RowDefinition Height="*" />
             </Grid.RowDefinitions>
 
+            <!--  TODO: Not AOT safe.  -->
             <ItemsControl Margin="50,0,16,0" ItemsSource="{x:Bind CalendarDays}">
                 <ItemsControl.ItemTemplate>
                     <DataTemplate x:DataType="models:CalendarDayModel">
@@ -97,7 +98,6 @@
                     <controls:WinoDayTimelineCanvas
                         Grid.Column="1"
                         HalfHourSeperatorColor="{ThemeResource CalendarSeperatorBrush}"
-                        PositionerUIElement="{Binding ElementName=RootGrid}"
                         RenderOptions="{x:Bind CalendarRenderOptions}"
                         SelectedCellBackgroundBrush="{ThemeResource CalendarFieldSelectedBackgroundBrush}"
                         SeperatorColor="{ThemeResource CalendarSeperatorBrush}"
@@ -112,6 +112,8 @@
                         ItemsSource="{x:Bind CalendarDays}">
                         <ItemsControl.ItemsPanel>
                             <ItemsPanelTemplate>
+                                <!--  Columns="{Binding CalendarRenderOptions.TotalDayCount}"  -->
+                                <!--  TODO: Columns should come from TotalDayCount to support custom dates.  -->
                                 <toolkitControls:UniformGrid
                                     Columns="{Binding CalendarRenderOptions.TotalDayCount}"
                                     Orientation="Horizontal"
@@ -277,6 +279,7 @@
                     Margin="0,6">
                     <ItemsControl.ItemTemplateSelector>
                         <selectors:CustomAreaCalendarItemSelector>
+                            <!--  TODO: DisplayingDate is not AOT safe.  -->
                             <selectors:CustomAreaCalendarItemSelector.AllDayTemplate>
                                 <DataTemplate x:DataType="data:CalendarItemViewModel">
                                     <controls:CalendarItemControl