UEF - allow delete plugin fields manually if plugin is already uninstalled

[Jimmi08]

Motivation

If the plugin is uninstalled without deleting EUF, there is no option to delete those fields later.

Plugin uninstallation deletes all EUF fields, sometimes this is not needed.

You can't delete only one field now.

Proposed Solution

Allow this for the main admin only.

[Jimmi08]

This is a working solution

                if(strpos($name, 'plugin_') === 0)
                {
                    $attributes['readParms']['deleteClass'] = e_UC_NOBODY;

                    $tmp_a = array();
                    $tmp_a = explode('_', $name);

                    if(count($tmp_a)==3) {
                        $plugin = $tmp_a[1];
                    }
                    else {

                        $tmp =  array_slice($tmp_a, 1, -1);
                        $plugin  = implode("_", $tmp);
                    }

                    if (e107::isInstalled($plugin) === FALSE)
                    {
                        $attributes['readParms']['deleteClass'] = e_UC_MAINADMIN;
                    }
                }

[Jimmi08]

It is possible via the batch option, it is enough.