Don't broadcast language change

Author: Yusyuriv

Flow.Launcher.Infrastructure/NativeMethods.txt

@@ -54,6 +54,5 @@ ActivateKeyboardLayout
 GetKeyboardLayoutList
 
 PostMessage
-HWND_BROADCAST
 WM_INPUTLANGCHANGEREQUEST
 INPUTLANGCHANGE_FORWARD

Flow.Launcher.Infrastructure/Win32Helper.cs

@@ -403,7 +403,9 @@ public static void RestorePreviousKeyboardLayout()
         {
             if (_previousLayout == HKL.Null) return;
 
-            PInvoke.PostMessage(HWND.HWND_BROADCAST,
+            var hwnd = PInvoke.GetForegroundWindow();
+            PInvoke.PostMessage(
+                hwnd,
                 PInvoke.WM_INPUTLANGCHANGEREQUEST,
                 PInvoke.INPUTLANGCHANGE_FORWARD,
                 _previousLayout.Value