Type names with matching `Title` brake the left panel viewlet

[szakitibi]

Expected result

Current behavior

Details

With types defined with matching translated titles, e.g. two "Folder" types like:

[...
 ('Folder',
  {'action': 'http://localhost:8080/Plone/++add++Folder',
   'description': '',
   'extra': {'class': 'contenttype-folder', 'id': 'folder', 'separator': None},
   'icon': None,
   'id': 'Folder',
   'selected': False,
   'submenu': None,
   'title': 'Folder'}),
...
 ('Folder',
  {'action': 'http://localhost:8080/Plone/++add++customers.special.Folder',
   'description': '',
   'extra': {'class': 'contenttype-customers-special-folder', 'id': 'customers-special-folder', 'separator': None},
   'icon': None,
   'id': 'customers.special.Folder',
   'selected': False,
   'submenu': None,
   'title': 'Folder'})]

This section of code forced to compare dictionaries:

plone.app.content/plone/app/content/browser/folderfactories.py

Lines 141 to 145 in bb29d64

	# Sort the addable content types based on their translated title
	results = [(translate(ctype['title'], context=request), ctype)
	for ctype in results]
	results.sort()
	results = [ctype[-1] for ctype in results]

Which results the following error:

TypeError: '<' not supported between instances of 'dict' and 'dict'

Suggested solution

results.sort(key=lambda ctype: translate(ctype['title'], context=request))

Note: Unless this violates some underlying rule banning matching titles for content types.