action_menu: selector, RTL, consistency fixes

On Base and Bootstrapbase, on both English (LTR) and Hebrew (RTL): Add the following code, building an action_menu, to a theme layout file. $am = new action_menu(); $am->initialise_js($PAGE); $am->set_menu_trigger("trigger"); $am->set_alignment(action_menu::TR, action_menu::BR);   $items = array( 'apples', 'bananas', 'cucumbers' ); foreach ($items as $value) { $al = new action_menu_link_secondary( new moodle_url('http://www.google.com/'), new pix_icon('a/setting', $value), $value ); $am->add($al); }   echo html_writer::tag( 'div', $OUTPUT->render($am), array('style' => 'position:relative; display:inline-block; width: 120px;') ); Verify that the action menu looks good (i.e. no icons out of place). Create a course, then navigate to its index and turn editing on. Verify that the activity editing dropdowns look good (and that a piece of extraneous padding on RTL is gone). Verify that the block editing dropdowns also look good. Go to the course and category management page ( /course/management.php ) Verify that the course category editing dropdown looks good. Verify that the icons outside of the dropdowns (i.e. the horizontal lists) still look good. Open the user menu. Verify that it looks good and not out of place.