Further loading/saving work

src/utils/widget_save_load_controller.py

@@ -1,6 +1,8 @@
 # Python imports
 
 # Lib imports
+import gi
+from gi.repository import GLib
 
 # Application imports
 
@@ -15,6 +17,7 @@ class WidgetSaveLoadController:
         super(WidgetSaveLoadController, self).__init__()
         self.saveable_data   = []
         self.save_collection = {
+            "uuid": "",
             "width": -1,
             "height": -1,
             "x": 0,