[Direct Transfer] Add a button to create a folder within the upload flow

On the transfer specification screen, I have a new button that allows me to create a new folder in Web UI using the FileManager.createFolder operation and selecting it as the target of the upload.
I can specify the title of the folder.

How it should work:

• I open the DT popup
• Select files(s)/folder(s)
• Select a remote folder where you have edit rights on it
  => The button New remote folder appears as you have rights on the previously selected path
• Click on New remote folder
  => The field expand to cover the path
• Type the name of your new folder
  => The path is updated with the created folder

WARNING:
This button should only create a folder at the location/level of your previously selected path and not an entirely new arborescence.