folderNameOfTrash should consider hierarchical trash

[Veladus]

If the trash folder is placed in a hierachy, the upmost directory will be set as folderNameOfTrash effectively making it the Trash. This is caused in folderFromResponse

[shm0sby]

In ICEndpoint>>folderFromResponse: the folder name for Trash is always the first member of the folderPath array.
If we have a trash folder below Inbox called Inbox.Trash e.g., currently we only take the first member Inbox.

See this loc:
(responseLine includesSubstring: '\Trash') ifTrue: [self folderNameOfTrash: folderPath first].

The idea of simply using ICEndpointFolder>>folderPath which holds Inbox.Trash in the example did not work, because on many sites we get protocol errors for many (strange) reasons. It seems to be more complicated than that.