Fix tag's view meta description

### How to test

1. Create menu item "Tagged items" choose any tag you want, but ensure that this tag has empty "Meta Description".
2. Fill in "Meta Description" in the menu item.
2. Proceed to tagged items view and notice that the meta description is empty.
3. Apply the patch.
4. Proceed to tagged items view and notice that meta description is taken from the menu item.
5. Fill in "Meta Description" in the chosen tag and ensure that it overrides meta description from the menu item.