ERP5 Subcategory: Remove '_'(underscore) from 'multiple_selection' subcategory...

ERP5 Subcategory: Remove '_'(underscore) from 'multiple_selection' subcategory in elmentary_type category.

Subcategory 'multiple_selection' has been renamed to 'multiple selection' to maintain consistency.
Earlier, whenever a new StandardCategory object was created with property_type 'multiple selection',
one needed to change the elementary type explicilty to use it to generate property setters and getters.
The example for this can be seen from this commit:
nexedi/erp5@fd738753
After this change, in the view, property type field couldn't recognize the property and displays
(???multiple selection).

Also, everywhere in erp5, list_types do mention 'multiple selction' and not 'multiple_selection'.
So, its better to maintain consistency in naming the subcategory.

product/ERP5/bootstrap/erp5_core/PathTemplateItem/portal_categories/elementary_type/multiple_selection.xml → product/ERP5/bootstrap/erp5_core/PathTemplateItem/portal_categories/elementary_type/multiple%20selection.xml

@@ -12,7 +12,7 @@
         </item>
         <item>
             <key> <string>id</string> </key>
-            <value> <string>multiple_selection</string> </value>
+            <value> <string>multiple selection</string> </value>
         </item>
         <item>
             <key> <string>portal_type</string> </key>

product/ERP5Configurator/Document/PreferenceConfiguratorItem.py

@@ -66,7 +66,7 @@ class PreferenceConfiguratorItem(ConfiguratorItemMixin, XMLObject):
           list_prefix = ''
           if prop.getProperty('multivalued') or (
                prop.getProperty('elementary_type') in (
-                 'lines', 'multiple_selection', 'tokens')):
+                 'lines', 'multiple selection', 'tokens')):
             list_prefix = '_list'
           property_id_list.append('%s%s' % (prop.getReference(), list_prefix))
     return property_id_list

product/ERP5Configurator/Document/SystemPreferenceConfiguratorItem.py

@@ -67,7 +67,7 @@ class SystemPreferenceConfiguratorItem(ConfiguratorItemMixin, XMLObject):
           list_prefix = ''
           if prop.getProperty('multivalued') or (
                prop.getProperty('elementary_type') in (
-                 'lines', 'multiple_selection', 'tokens')):
+                 'lines', 'multiple selection', 'tokens')):
             list_prefix = '_list'
           property_id_list.append('%s%s' % (prop.getReference(), list_prefix))
     return property_id_list