changed sidebar menu. #363 Vouchers has its own menu, kit requests is alone now and equipment/rooms/health partners are now inside configuration

added middleware to redirect the user to a confirmation page whenever a study has a privacy_notice assigned, this is enforced and the user haven't accepted yet. superusers excluded

fixed issue with view logout

WIP: After the update, is failing to validate forms with boolean fields.
If the boolean fields are not present, like postponed field on the test test_validation of web.tests.forms.test_StudySubjectEditForm.StudySubjectEditFormTests.

not sure how to proceed with the changes, apparently this should have raised issues before, because the docs indicate the following:
https://docs.djangoproject.com/en/2.1/ref/forms/fields/#booleanfield

test_validation (web.tests.forms.test_StudySubjectEditForm.StudySubjectEditFormTests) ... <ul class="errorlist"><li>postponed<ul class="errorlist"><li>This field is required.</li></ul></li></ul>