Fix in Save dialogs, current directory is not last visited (fix asepr…

…ite#3996)

This regression was added in 1.3rc5.
Every time you wanted to save a new sprite the dialog would start
at the root path instead of the last used directory location.

src/app/ui/file_selector.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2022  Igara Studio S.A.
+// Copyright (C) 2019-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -412,8 +412,8 @@ bool FileSelector::show(
 
   // We have to find where the user should begin to browse files
   std::string start_folder_path;
-  if (initialPath.empty()) {
-    start_folder_path = get_initial_path_to_select_filename(initialPath);
+  if (base::get_file_path(initialPath).empty()) {
+    start_folder_path = get_current_dir_for_file_selector();
   }
   else {
     start_folder_path = base::get_file_path(initialPath);