feat: add icons for creation and editing windows

Author: Xiphereal

Desktop/App.xaml

@@ -2,7 +2,6 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:sys="clr-namespace:System;assembly=mscorlib"
-
              DispatcherUnhandledException="App_OnDispatcherUnhandledException">
     <Application.Resources>
         <ResourceDictionary>

Desktop/Resources/Add.ico

@@ -7,6 +7,7 @@
         mc:Ignorable="d"
         x:Name="TaskCreationWindow"
         Title="Task creation" Height="{StaticResource PopupWindowHeight}" Width="{StaticResource PopupWindowWidth}"
+        Icon="..\Resources\Add.ico"
         WindowStartupLocation="CenterScreen">
     <Window.Resources>
         <converters:SaveCommandConverter x:Key="SaveCommandConverter" />

Desktop/Resources/Edit.ico

@@ -5,6 +5,7 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         mc:Ignorable="d"
         Title="Task editing" Height="{StaticResource PopupWindowHeight}" Width="{StaticResource PopupWindowWidth}"
+        Icon="..\Resources\Edit.ico"
         WindowStartupLocation="CenterScreen">
     <Grid FocusManager.FocusedElement="{Binding ElementName=Name}" Margin="{StaticResource DefaultMargin}">
         <Grid.RowDefinitions>