Animates the height on breadcrumb dropdown menus to transition to the
loaded animations quicker. Includes a new animation helper for doing
similar tasks in future.
User search input blur would trigger the submission of the search
filters which would cause strange thing where you'd click on a search
filtered user which would blur the input hence submit, but the user
would think they've clicked the user and the page would reload but the
input had not updated at that point.
Related to #2863
