fix folder dialog on linux

VeloeMinecraftLauncher/ViewModels/SettingsWindowViewModel.cs

@@ -5,6 +5,7 @@ using System.IO;
 using System.Reflection;
 using VeloeMinecraftLauncher.MinecraftLauncher;
 using Avalonia.Controls;
+using System.Threading.Tasks;
 
 namespace VeloeMinecraftLauncher.ViewModels
 {
@@ -125,46 +126,52 @@ namespace VeloeMinecraftLauncher.ViewModels
 
         public void OpenMinecraftPathDialog(Window window)
         {
-            OpenFolderDialog dialog = new OpenFolderDialog();
+            Task.Run(() =>
+            {
+                OpenFolderDialog dialog = new OpenFolderDialog();
 
-            var initPath = String.Empty;
+                var initPath = String.Empty;
 
-            if (Settings.MinecraftForlderPath is not null)
-                if(Settings.MinecraftForlderPath != String.Empty)
-                   initPath = Path.GetFullPath(Settings.MinecraftForlderPath);
+                if (Settings.MinecraftForlderPath is not null)
+                    if (Settings.MinecraftForlderPath != String.Empty)
+                        initPath = Path.GetFullPath(Settings.MinecraftForlderPath);
 
-            dialog.InitialDirectory = initPath;
+                dialog.InitialDirectory = initPath;
 
-            var result = dialog.ShowAsync(window).Result;
-            if (result is null)
-                return;
+                var result = dialog.ShowAsync(window).Result;
+                if (result is null)
+                    return;
 
-            if (result == String.Empty)
-                return;
+                if (result == String.Empty)
+                    return;
 
-            MinecraftFolderPath = result;
+                MinecraftFolderPath = result;
+            });
         }
 
         public void OpenJavaPathDialog(Window window)
         {
-            OpenFolderDialog dialog = new OpenFolderDialog();
+            Task.Run(() =>
+            {
+                OpenFolderDialog dialog = new OpenFolderDialog();
 
-            var initPath = String.Empty;
+                var initPath = String.Empty;
 
-            if (Settings.JavaPath is not null)
-                if (Settings.JavaPath != String.Empty)
-                    initPath = Path.GetFullPath(Settings.JavaPath);
+                if (Settings.JavaPath is not null)
+                    if (Settings.JavaPath != String.Empty)
+                        initPath = Path.GetFullPath(Settings.JavaPath);
 
-            dialog.InitialDirectory = initPath;
+                dialog.InitialDirectory = initPath;
 
-            var result = dialog.ShowAsync(window).Result;
-            if (result is null)
-                return;
+                var result = dialog.ShowAsync(window).Result;
+                if (result is null)
+                    return;
 
-            if (result == String.Empty)
-                return;
+                if (result == String.Empty)
+                    return;
 
-            JavaPath = result;
+                JavaPath = result;
+            });
         }
     }
     }