Fix: Fixed settings background in dark mode (#11316)

Author: yaira2

src/Files.App/App.xaml

@@ -47,6 +47,7 @@
 							<SolidColorBrush x:Key="App.Theme.AddressBar.BackgroundBrush" Color="{StaticResource LayerOnMicaBaseAltFillColorDefault}" />
 							<SolidColorBrush x:Key="App.Theme.Sidebar.BackgroundBrush" Color="{StaticResource CardBackgroundFillColorDefault}" />
 							<SolidColorBrush x:Key="App.Theme.FileArea.BackgroundBrush" Color="{StaticResource CardBackgroundFillColorDefault}" />
+							<SolidColorBrush x:Key="App.Theme.ContentDialog.BackgroundBrush" Color="{StaticResource CardBackgroundFillColorSecondary}" />
 
 							<SolidColorBrush x:Key="TabViewItemHeaderBackground" Color="{StaticResource SubtleFillColorTransparent}" />
 							<SolidColorBrush x:Key="TabViewItemHeaderBackgroundSelected" Color="{StaticResource LayerOnMicaBaseAltFillColorDefault}" />
@@ -58,6 +59,7 @@
 							<SolidColorBrush x:Key="App.Theme.AddressBar.BackgroundBrush" Color="{StaticResource LayerOnMicaBaseAltFillColorDefault}" />
 							<SolidColorBrush x:Key="App.Theme.Sidebar.BackgroundBrush" Color="#993A3A3A" />
 							<SolidColorBrush x:Key="App.Theme.FileArea.BackgroundBrush" Color="#993A3A3A" />
+							<SolidColorBrush x:Key="App.Theme.ContentDialog.BackgroundBrush" Color="{StaticResource LayerOnMicaBaseAltFillColorSecondary}" />
 
 							<SolidColorBrush x:Key="TabViewItemHeaderBackground" Color="{StaticResource SubtleFillColorTransparent}" />
 							<SolidColorBrush x:Key="TabViewItemHeaderBackgroundSelected" Color="{StaticResource LayerOnMicaBaseAltFillColorDefault}" />
@@ -69,6 +71,7 @@
 							<SolidColorBrush x:Key="App.Theme.AddressBar.BackgroundBrush" Color="Transparent" />
 							<SolidColorBrush x:Key="App.Theme.Sidebar.BackgroundBrush" Color="{StaticResource CardBackgroundFillColorDefault}" />
 							<SolidColorBrush x:Key="App.Theme.FileArea.BackgroundBrush" Color="{StaticResource CardBackgroundFillColorDefault}" />
+							<SolidColorBrush x:Key="App.Theme.ContentDialog.BackgroundBrush" Color="{StaticResource SolidBackgroundFillColorBase}" />
 
 							<SolidColorBrush x:Key="TabViewItemHeaderBackground" Color="{StaticResource SystemColorWindowColor}" />
 							<SolidColorBrush x:Key="TabViewItemHeaderBackgroundSelected" Color="{StaticResource LayerFillColorDefault}" />

src/Files.App/Dialogs/SettingsDialog.xaml

@@ -22,7 +22,7 @@
 			MaxHeight="790"
 			HorizontalAlignment="Stretch"
 			VerticalAlignment="Stretch"
-			Background="{ThemeResource CardBackgroundFillColorSecondary}">
+			Background="{ThemeResource App.Theme.ContentDialog.BackgroundBrush}">
 			<Grid.RowDefinitions>
 				<RowDefinition Height="44" />
 				<RowDefinition Height="*" />