[etwist] fix handling of multiple files per field
html5 permits multiple files uploads, which can be expressed as::
<input type='file' multiple='multiple' />
This changeset avoids previous crash. Nothing is changed when a single file is
uploaded (backward compat is thus preserved). When multiple files are uploaded
for a single html input tag, the corresponding web request form key receives a
list of tuples like [('filename-1', IStream1), ('filename-2', IStream2), ...].
closes #2847207.
# -*- coding: utf-8 -*-
###############################################################################
#
# Put here information about external resources / styles used by your cube,
# or to overides existing UI properties.
#
# Existing properties are available through the `sheet` dictionary available
# in the global namespace. You also have access to a `data` function which
# will return proper url for resources in the 'data' directory.
#
# /!\ this file should not be imported /!\
###############################################################################
# CSS stylesheets to include in HTML headers
# uncomment the line below to use template specific stylesheet
# STYLESHEETS = sheet['STYLESHEETS'] + [data('cubes.%(cubename)s.css')]