docs: def edit_tree_item(self):
          """
          if sender is self.tree_gui_settings this will open a filedialog and ask for a filepath
          this filepath will be updated in the field of self.tree_gui_settings that has been double clicked
          """
  
          def open_path_dialog_folder(path):
              """
              opens a file dialog to get the path to a file and
              """
              dialog = QtWidgets.QFileDialog()
              dialog.setFileMode(QtWidgets.QFileDialog.Directory)
              dialog.setOption(QtWidgets.QFileDialog.ShowDirsOnly, True)
              path = dialog.getExistingDirectory(self, 'Select a folder:', path)
  
              return path
  
          tree = self.sender()
  
          if tree == self.tree_gui_settings:
  
              index = tree.selectedIndexes()[0]
              model = index.model()
  
              if index.column() == 1:
                  path = model.itemFromIndex(index).text()
                  key = str(model.itemFromIndex(model.index(index.row(), 0)).text())
                  if(key == 'gui_settings'):
                      path, _ = QtWidgets.QFileDialog.getSaveFileName(self, caption = 'Select a file:', directory = path, filter = '*.b26')
                      if path:
                          name, extension = os.path.splitext(path)
                          if extension != '.b26':
                              path = name + ".b26"
                  else:
                      path = str(open_path_dialog_folder(path))
  
                  if path != "":
                      self.gui_settings.update({key : str(os.path.normpath(path))})
                      self.fill_treeview(tree, self.gui_settings)