Create a new folder
A user must be able to create a new folder at the root of a corpus, or in any other folder.
An action button + New folder
should be present when:
- browsing a corpus,
- browsing a folder
It should open a modal, asking for the folder name & type (through a select only displaying the possible choices)
Upon submission, the modal should simply close. Displaying the new folder in the list would be complicated in long lists.
Other choice: redirect to that newly created folder.