Fixed an issue that if Orca was invoke by associated files, local dat…

…a_dir was not used (#7049)

# Description

fixed #6987
# Screenshots/Recordings/Graphs

<!--
> Please attach relevant screenshots to showcase the UI changes.
> Please attach images that can help explain the changes.
-->

## Tests

<!--
> Please describe the tests that you have conducted to verify the
changes made in this PR.
-->

src/slic3r/GUI/GUI_App.cpp

@@ -1908,9 +1908,18 @@ void GUI_App::init_app_config()
 	// Mac : "~/Library/Application Support/Slic3r"
 
     if (data_dir().empty()) {
-        // Orca: check if data_dir folder exists in application folder
-        // use it if it exists
-        boost::filesystem::path app_data_dir_path = boost::filesystem::current_path() / "data_dir";
+        // Orca: check if data_dir folder exists in application folder use it if it exists
+        // Note:wxStandardPaths::Get().GetExecutablePath() return following paths
+        // Unix: /usr/local/bin/exename
+        // Windows: "C:\Programs\AppFolder\exename.exe"
+        // Mac: /Applications/exename.app/Contents/MacOS/exename
+        // TODO: have no idea what to do with Linux bundles
+        auto _app_folder = boost::filesystem::path(wxStandardPaths::Get().GetExecutablePath().ToUTF8().data()).parent_path();
+#ifdef __APPLE__
+        // On macOS, the executable is inside the .app bundle.
+        _app_folder = _app_folder.parent_path().parent_path().parent_path();
+#endif
+        boost::filesystem::path app_data_dir_path = _app_folder / "data_dir";
         if (boost::filesystem::exists(app_data_dir_path)) {
             set_data_dir(app_data_dir_path.string());
         }