update binding for Theme tab

Author: jjw24

Flow.Launcher/Languages/en.xaml

@@ -32,7 +32,7 @@
     <system:String x:Key="pythonDirectory">Python Directory</system:String>
     <system:String x:Key="autoUpdates">Auto Update</system:String>
     <system:String x:Key="autoHideScrollBar">Auto Hide Scroll Bar</system:String>
-    <system:String x:Key="autoHideScrollBarToolTip">Automatically hides the Settings window scroll bar, and show when hover the mouse over it. This setting will take effect on next window open</system:String>
+    <system:String x:Key="autoHideScrollBarToolTip">Automatically hides the Settings window scroll bar and show when hover the mouse over it</system:String>
     <system:String x:Key="selectPythonDirectory">Select</system:String>
     <system:String x:Key="hideOnStartup">Hide Flow Launcher on startup</system:String>
     <system:String x:Key="hideNotifyIcon">Hide tray icon</system:String>

Flow.Launcher/SettingWindow.xaml

@@ -224,7 +224,7 @@
                     <Button DockPanel.Dock="Top" Margin="0,10,0,0" Width="180" HorizontalAlignment="Center" 
                             Click="OpenPluginFolder">Open Theme Folder</Button>
                     <ListBox DockPanel.Dock="Top" SelectedItem="{Binding SelectedTheme}" ItemsSource="{Binding Themes}" 
-                             ui:ScrollViewerHelper.AutoHideScrollBars="{Binding Settings.AutoHideScrollBar}"
+                             ui:ScrollViewerHelper.AutoHideScrollBars="{Binding AutoHideScrollBar, Mode=OneWay}"
                              Margin="10, 0, 10, 10" Width="180" Height="394" />
 
                 </DockPanel>