Loading icon doesn't go away after adding layers from search

[jonescc]

rc.aodn.org.au

Steps to reproduce

a) Load portal, got to the search tab and search for soop maplayers b) add a layer from any returned record using the add layer icon. c) go to map d) go back to search and add another layer using the add layer icon e) go to map

What happens

Loading icon stays there spinning and doesn't stop after selected layers have been added

What I expect to happen

Loading icon should disappear after both layers have been added

[jonescc]

Note that this doesn't occur in production and so seems to have been introduced in the last iteration.

[dnahodil]

Reviewed. Looks good.