Better document a workaround

src/gui-window.c

@@ -220,7 +220,9 @@ update_courses (GuiWindow *self)
                           self->courses[i].name);
   }
 
-  // ellipsize the labels
+  // ellipsize the labels, this is a workaround.
+  // See https://source.puri.sm/Librem5/libhandy/issues/118 for the bug report
+  // and https://gitlab.gnugen.ch/afontain/moodle/issues/20
   GtkWidget *scrolled_win = gtk_bin_get_child (GTK_BIN (self->sidebar));
   GtkWidget *viewport     = gtk_bin_get_child (GTK_BIN (scrolled_win));
   GtkWidget *label_list   = gtk_bin_get_child (GTK_BIN (viewport));