Windows: use the correct window handle for creating message boxes. This became important after the introduction of the wait dialog in order to avoid having message boxes behind the wait dialog.

src/Common/Keyfiles.h

@@ -34,7 +34,7 @@ KeyFile *KeyFileAdd (KeyFile *firstKeyFile, KeyFile *keyFile);
 void KeyFileRemoveAll (KeyFile **firstKeyFile);
 KeyFile *KeyFileClone (KeyFile *keyFile);
 KeyFile *KeyFileCloneAll (KeyFile *firstKeyFile);
-BOOL KeyFilesApply (Password *password, KeyFile *firstKeyFile);
+BOOL KeyFilesApply (HWND hwndDlg, Password *password, KeyFile *firstKeyFile);
 
 BOOL CALLBACK KeyFilesDlgProc (HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam);
 BOOL KeyfilesPopupMenu (HWND hwndDlg, POINT popupPosition, KeyFilesDlgParam *dialogParam);