spec: add tiny-mce left align button check
spec: add tiny-mce left align button check

Change-Id: If31f3c79761e531ea7f2b1c0ab356b1ef4f677be
Reviewed-on: https://gerrit.instructure.com/67952
Tested-by: Jenkins
Product-Review: Jeremy Putnam <b030d6d6f199f844ec424882be473c2ab9adc93b@instructure.com>
QA-Review: Jeremy Putnam <b030d6d6f199f844ec424882be473c2ab9adc93b@instructure.com>
Reviewed-by: Derek Hansen <cb1116771307a93b98b6babf698410ed3846296d@instructure.com>

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