Fix XAML warnings in settings window

Author: Yusyuriv

Flow.Launcher/Resources/Controls/ExCard.xaml

@@ -53,7 +53,7 @@
                                                 FontStyle="{TemplateBinding FontStyle}"
                                                 FontWeight="{TemplateBinding FontWeight}"
                                                 Foreground="{TemplateBinding Foreground}"
-                                                IsChecked="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}">
+                                                IsChecked="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource AncestorType=Expander}}">
                                                 <ToggleButton.Style>
                                                     <Style TargetType="{x:Type ToggleButton}">
                                                         <Setter Property="Template">

Flow.Launcher/SettingPages/Views/SettingsPaneTheme.xaml

@@ -14,7 +14,6 @@
     d:DataContext="{d:DesignInstance viewModels:SettingsPaneThemeViewModel}"
     d:DesignHeight="450"
     d:DesignWidth="800"
-    Style="{DynamicResource SettingPageBasic}"
     mc:Ignorable="d">
     <ui:Page.Resources>
         <ResourceDictionary>