[BitBucket user: Benjamin Golinvaux]
[BitBucket date: 2019-01-21.08:49:20]

I second that having the ability to drag and drop a folder would be nice. Meanwhile, the following works for me when I need to import all dicom files in a folder hierarchy :

Under Windows: 

* open an explorer window at the folder location
* press F3 to focus on the file search edit box
* type *.dcm + ENTER
* select all the files (click on first one then SHIFT+click on last one)
* drag and drop this set of files on the Orthanc Explorer drop area.

I assume the same must be available in the Finder or in your Linux graphical file explorer (Dolphin, Nautilus..?)

Hope this helps.