Detected while researching @ MDL-63765.

It seems that there is another behat step: i_open_the_blocks_action_menu() that uses a complete different way to play with action menus when compared with i_open_the_action_menu_in().

This issue is about to decide what to do with the former:

• adapt it to work in a similar way.
• adapt it to call the later.
• deprecate it if the later is good enough.

Note that apparently, there are not uses of the former in core, while the later is used everywhere, for blocks and for everything else.

Pick one, ciao