Quickedit "title" isn't really used #340
Description
Fieldmanager_Context_QuickEdit's construct and Fieldmanager_Field::add_quickedit_box() take the following arguments:
$title$post_types$column_display_callback$column_title
The first argument $title has no independent function. It only acts as the default column title if $column_title is not set, but that's it, so if the $column_title is specified, it does nothing. It should be used in the Quickedit box as a group heading, if it's not empty. This would inherently provide the option to hide this heading if it were to be left empty.