If I click the "More Styles" option in the styles dropdown on my main toolbar when the "Styles and Formatting" sidebar is displayed, the "Styles and Formatting" sidebar is hidden. The "More Styles" option obviously works as a toggle switch whereas it should display the "Styles and Formatting" sidebar if it is now shown or highlight it if it already is visible.
*** This bug has been marked as a duplicate of bug 88396 ***