fix: cast data types correctly

dzgui/views/trees/tree_base.py

@@ -147,7 +147,7 @@ class TreeView(CursorMixin, Gtk.TreeView):  # type: ignore
         path = pathlist[0]
         tree_iter = model.get_iter(path)
         value = model.get_value(tree_iter, index)
-        return str(value)
+        return value
 
     def get_name(self) -> str:
         name = self.get_value_at_index(0)