Add hyperlink to learn more about file manager usage in settings dialog

Flow.Launcher/Languages/en.xaml

@@ -367,6 +367,7 @@
     <!--  FileManager Setting Dialog  -->
     <system:String x:Key="fileManagerWindow">Select File Manager</system:String>
     <system:String x:Key="fileManager_files_btn">Do you use Files?</system:String>
+    <system:String x:Key="fileManager_learnMore">Learn more</system:String>
     <system:String x:Key="fileManager_files_tips">Depending on the version, Files may use either "Files" or "Files-stable" as its path. (This can vary depending on which version you're using.) For more details, see:</system:String>
     <system:String x:Key="fileManager_tips">Please specify the file location of the file manager you using and add arguments as required. The &quot;%d&quot; represents the directory path to open for, used by the Arg for Folder field and for commands opening specific directories. The &quot;%f&quot; represents the file path to open for, used by the Arg for File field and for commands opening specific files.</system:String>
     <system:String x:Key="fileManager_tips2">For example, if the file manager uses a command such as &quot;totalcmd.exe /A c:\windows&quot; to open the c:\windows directory, the File Manager Path will be totalcmd.exe, and the Arg For Folder will be /A &quot;%d&quot;. Certain file managers like QTTabBar may just require a path to be supplied, in this instance use &quot;%d&quot; as the File Manager Path and leave the rest of the fileds blank.</system:String>

Flow.Launcher/SelectFileManagerWindow.xaml

@@ -73,12 +73,19 @@
                         <TextBlock Margin="0 14 0 0" FontSize="14">
                             <TextBlock Text="{DynamicResource fileManager_tips2}" TextWrapping="WrapWithOverflow" />
                         </TextBlock>
-                        <Button
-                            x:Name="btnTips"
-                            Margin="0 14 0 0"
-                            HorizontalAlignment="Left"
-                            Click="btnTips_Click"
-                            Content="{DynamicResource fileManager_files_btn}" />
+                        <StackPanel Margin="0 14 0 0" Orientation="Horizontal">
+                            <Button
+                                x:Name="btnTips"
+                                Margin="0 14 0 0"
+                                HorizontalAlignment="Left"
+                                Click="btnTips_Click"
+                                Content="{DynamicResource fileManager_files_btn}" />
+                            <TextBlock Margin="10 8 0 0" VerticalAlignment="Center">
+                                <Hyperlink NavigateUri="https://www.flowlauncher.com/docs/#/filemanager" RequestNavigate="Hyperlink_RequestNavigate">
+                                    <TextBlock FontSize="14" Text="{DynamicResource fileManager_learnMore}" />
+                                </Hyperlink>
+                            </TextBlock>
+                        </StackPanel>
                     </StackPanel>
                     <Rectangle
                         Height="1"

Flow.Launcher/SelectFileManagerWindow.xaml.cs

@@ -45,6 +45,16 @@ namespace Flow.Launcher
         {
             Close();
         }
+        
+        private void Hyperlink_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
+        {
+            Process.Start(new ProcessStartInfo
+            {
+                FileName = e.Uri.AbsoluteUri,
+                UseShellExecute = true
+            });
+            e.Handled = true;
+        }
 
         private void btnDone_Click(object sender, RoutedEventArgs e)
         {