Triangles are still visible even enzymes are already not shown in sequence view

Scenario to reproduce:

1. Open "test/_common_data/fasta/human_T1_cutted.fa".
2. Click the "Find restriction sites" button on the main toolbar.
3. Select a single enzyme: "FaiI". Start the search.
   Expected state: there are two annotations: (151..154), (188..191).
4. See to the annotation (151..154). There are triangles on the detailed view between 152 and 153 bases.
5. Click the "Global automatic annotation highlighting" button on the main toolbar and select the "Hide restriction sites" menu item.
   Expected state: annotation and triangles are not shown.
   Current state: annotations are not shown, but triangles are still visible.