[primary] refactor primary view handling of relation's label
to properly handle label optionaly specified in dispctrl (no more default set)
and use contextual translation by default.
Also, consistent handling in attributes, relations and sideboxes section.
Introduce new support_args function to use when possible instead of
try/except TypeError.
###############################################################################
#
# 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 /!\
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# CSS stylesheets to include in HTML headers
# uncomment the line below to use template specific stylesheet
# STYLESHEETS = sheet['STYLESHEETS'] + [data('cubes.%(cubename)s.css')]