re-enable possiblity for selecting multiple files in file dialog

Author: sigurdga

fileupload/templates/fileupload/picture_form.html

@@ -28,7 +28,7 @@
             {% csrf_token %}
             <label class="fileinput-button">
                 <span>Add files...</span>
-                <input type="file" name="file">
+                <input type="file" name="file" multiple>
             </label>
             <button type="submit" class="start">Start upload</button>
             <button type="reset" class="cancel">Cancel upload</button>