Display failure messages if user is using IE.
Display failure messages if user is using IE.

Affected pages are:
 * create: shows a failure message
 * collection: shows a failure message
 * api-docs: shows a warning message at the top, but still tries
 to run the example scripts. It's unclear at this point whether that
 actually works; seems to depend on which kind of IE testing we're
 doing.

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