Reimplement panel resizing

Author: marticliment

src/UniGetUI/Pages/SoftwarePages/AbstractPackagesPage.xaml

@@ -1218,17 +1218,19 @@
                     Visibility="Visible" />
 
                 <!--  Filters/Packages Splitter  -->
-                <Toolkit:GridSplitter
+                <Toolkit:PropertySizer
                     x:Name="FiltersResizer"
                     Width="10"
                     Margin="0,1,0,1"
-                    Padding="-2,0,-2,0"
+                    Padding="0,0,0,0"
                     HorizontalAlignment="Left"
-                    CornerRadius="2">
-                    <Toolkit:GridSplitter.RenderTransform>
+                    Binding="{x:Bind FilteringPanel.OpenPaneLength, Mode=TwoWay}"
+                    CornerRadius="2"
+                    Visibility="{x:Bind FilteringPanel.IsPaneOpen, Mode=OneWay}">
+                    <Toolkit:PropertySizer.RenderTransform>
                         <TranslateTransform X="-11" />
-                    </Toolkit:GridSplitter.RenderTransform>
-                </Toolkit:GridSplitter>
+                    </Toolkit:PropertySizer.RenderTransform>
+                </Toolkit:PropertySizer>
 
                 <!--  ACTUAL PACKAGE LIST  -->
                 <Grid

src/UniGetUI/Pages/SoftwarePages/AbstractPackagesPage.xaml.cs

@@ -1017,22 +1017,26 @@ private async void ShowFilteringPane(bool skipAnimation = false)
             FilteringPanel.DisplayMode = SplitViewDisplayMode.Inline;
             FilteringPanel.IsPaneOpen = true;
             ToggleFiltersButton.IsChecked = true;
-            /*if (PaneIsAnimated) return;
 
-            PaneIsAnimated = true;
-            FiltersResizer.Visibility = SidePanel.Visibility = Visibility.Visible;
-            BodyGrid.ColumnSpacing = 12;
-            InAnimation_FiltersPane.Start();
-
-            int final_width = 250;
+            int finalWidth = 250;
             try
             {
-                final_width = Settings.GetDictionaryItem<string, int>("SidepanelWidths", PAGE_NAME);
+                finalWidth = Settings.GetDictionaryItem<string, int>("SidepanelWidths", PAGE_NAME);
             }
             catch
             {
                 Settings.SetDictionaryItem("SidepanelWidths", PAGE_NAME, 250);
             }
+            FilteringPanel.OpenPaneLength = finalWidth;
+
+            /*if (PaneIsAnimated) return;
+
+            PaneIsAnimated = true;
+            FiltersResizer.Visibility = SidePanel.Visibility = Visibility.Visible;
+            BodyGrid.ColumnSpacing = 12;
+            InAnimation_FiltersPane.Start();
+
+            
 
             if (!skipAnimation)
             {