Dropdown problems #299

Hi,

In using the plugin we found 2 problems for the dropdown type :

• When the dropdown name is too long,
  If you create a dropdown field it generate an error.
  The field is created but can't be configured and can't be deleted.
  When you try to delete it with massivaction it generate this error in debug mod :

Fatal error: Uncaught Zend\Cache\Psr\SimpleCache\SimpleCacheInvalidArgumentException: Invalid key "glpi_plugin_fields_dclarationeffectueparfielddropdowns_ancestors_cache_2" provided; key is too long.
Must be no more than 64 characters in /usr/share/php/Zend/Cache/Psr/SimpleCache/SimpleCacheDecorator.php:344
Stack trace: #0 /usr/share/php/Zend/Cache/Psr/SimpleCache/SimpleCacheDecorator.php(279): Zend\Cache\Psr\SimpleCache\SimpleCacheDecorator->validateKey('glpi_plugin_fie...')
#1 /usr/share/glpi/inc/dbutils.class.php(802): Zend\Cache\Psr\SimpleCache\SimpleCacheDecorator->has('glpi_plugin_fie...')
#2 /usr/share/glpi/inc/db.function.php(305): DbUtils->getAncestorsOf('glpi_plugin_fie...', '2')
#3 /usr/share/glpi/inc/commontreedropdown.class.php(296): getAncestorsOf('glpi_plugin_fie...', '2')
#4 /usr/share/glpi/inc/commontreedropdown.class.php(160): CommonTreeDropdown->cleanParentsSons()
#5 /usr/share/glpi/inc/commondbtm.class.php(1652): CommonTreeDropdown->pre_deleteItem()
#6 /usr/share/glpi/inc/massiveaction.class.php(1073): in /usr/share/php/Zend/Cache/Psr/SimpleCache/SimpleCacheDecorator.php on line 344

• You can't define a default value to the dropdown

Glpi version 9.3.3
Plugin version 1.8.2