ag_app_open_chart() now saves the URI of the opened chart to the created window

src/ag-app.c

@@ -110,11 +110,15 @@ ag_app_open_chart(AgApp *app, GFile *file)
     GtkWidget *window;
     AgChart *chart;
     GError *err = NULL;
+    gchar *uri;
 
     chart = ag_chart_load_from_file(file, &err);
     window = ag_app_create_window(app);
     ag_window_set_chart(AG_WINDOW(window), chart);
     ag_window_update_from_chart(AG_WINDOW(window));
+    uri = g_file_get_uri(file);
+    ag_window_set_uri(AG_WINDOW(window), uri);
+    g_free(uri);
 }
 
 static void