CQ: Correct SideBar manipulation

Author: XTorLukas

src/Files.App/Helpers/Application/AppLanguageHelper.cs

@@ -36,6 +36,8 @@ public static class AppLanguageHelper
 
 		public static CultureInfo PreferredCulture => new(PreferredLanguage.Code);
 
+		public static FlowDirection FlowDirection => PreferredCulture.TextInfo.IsRightToLeft ? FlowDirection.RightToLeft : FlowDirection.LeftToRight;
+
 		/// <summary>
 		/// Initializes the <see cref="AppLanguageHelper"/> class.
 		/// </summary>
@@ -145,7 +147,7 @@ public static bool UpdateTitleBar(Window window)
 		// TODO: Replaced by RealTime Resources in the future
 		public static void UpdateContextLayout(FrameworkElement element)
 		{
-			element.FlowDirection = PreferredCulture.TextInfo.IsRightToLeft ? FlowDirection.RightToLeft : FlowDirection.LeftToRight;
+			element.FlowDirection = FlowDirection;
 		}
 
 		// TODO: Replaced by RealTime Resources in the future

src/Files.App/UserControls/Sidebar/SidebarView.xaml.cs

@@ -130,7 +130,8 @@ private void SidebarResizer_ManipulationStarted(object sender, ManipulationStart
 
 		private void SidebarResizer_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
 		{
-			var newWidth = preManipulationSidebarWidth + e.Cumulative.Translation.X;
+			var rePos = AppLanguageHelper.FlowDirection == FlowDirection.LeftToRight ? 1 : -1;
+			var newWidth = preManipulationSidebarWidth + (e.Cumulative.Translation.X * rePos);
 			UpdateDisplayModeForPaneWidth(newWidth);
 			e.Handled = true;
 		}