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[BIOCAT-848] Fixed duplicate annotations problem

This problem was due to some old plugins not playing nicely with the new asset pipeline...
The old widgets plugin has a special javascript_include_tag alias method that manually appended the widgets/tooltip javascript library to all the other JS libraries - the old way.
We've switched to the asset pipeline now so sprockets handles JS inclusion but this old alias managed to include the JS the old way whilst sprockets included them the new way; hence the duplication error when adding annotations - because the JS libraries were included twice.

I’ve deleted the alias method and everything seems to work.