[ITree] fix adapter/_done_init to handle tree_[attribute|relation], add maxlevel argument to base tree view since one side effect of the new code is that it find tree view for entity types it didn't find before, hence one may want to limit tree view depth when it wasn't necessary before
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# Put here information about external resources / styles used by your cube,
# or to overides existing UI properties.
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# 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.
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# /!\ 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')]