Partially cut off final option in search fields
Partially cut off final option in search fields

...to hint that you can scroll for more on OSes that don't include
scrollbars

Closes #1132

CKrawczyk/Panoptes-Front-End,edpaget/Panoptes-Front-End,CKrawczyk/Panoptes-Front-End,tfmorris/Panoptes-Front-End,amyrebecca/Panoptes-Front-End,fmnhExhibits/Panoptes-Front-End,parrish/Panoptes-Front-End,fmnhExhibits/Panoptes-Front-End,parrish/Panoptes-Front-End,amyrebecca/Panoptes-Front-End,edpaget/Panoptes-Front-End,mrniaboc/Panoptes-Front-End,jelliotartz/Panoptes-Front-End,jelliotartz/Panoptes-Front-End,parrish/Panoptes-Front-End,jelliotartz/Panoptes-Front-End,amyrebecca/Panoptes-Front-End,alexbfree/Panoptes-Front-End,tfmorris/Panoptes-Front-End,camallen/Panoptes-Front-End,camallen/Panoptes-Front-End,alexbfree/Panoptes-Front-End,zooniverse/Panoptes-Front-End,camallen/Panoptes-Front-End,mrniaboc/Panoptes-Front-End,CKrawczyk/Panoptes-Front-End,mrniaboc/Panoptes-Front-End,edpaget/Panoptes-Front-End,fmnhExhibits/Panoptes-Front-End,alexbfree/Panoptes-Front-End