Adds user chosen project **Script_Editor_tabWidget** Widget tab Model.

        :return: Method success.
        :rtype: bool

        :note: May require user interaction.

def add_project_ui(self):
        """
        Adds user chosen project **Script_Editor_tabWidget** Widget tab Model.

        :return: Method success.
        :rtype: bool

        :note: May require user interaction.
        """

        directory = umbra.ui.common.store_last_browsed_path(QFileDialog.getExistingDirectory(self,
                                                                                             "Add Project:",
                                                                                             RuntimeGlobals.last_browsed_path))
        if not directory:
            return False

        return self.add_project(directory)