Make the suggestions of an autocomplete exposed form clickable
Install Better Exposed Filters module , got to your views, in Advanced section In Exposed form style: select better exposed .

The Better Exposed Filters module replaces the Views' default single-
or multi-select boxes with radio buttons or checkboxes, respectively.
Description fields and Select All/None links can be added to exposed
filters to make for a better user experience. Views Filters is a
powerful tool to refine the results returned by a given view. When you
expose a filter, you allow the user to interact with the view making
it easy to build a customized, advanced search. For example, exposing
the node type field as a filter lets your site visitor limit their
search queries to just blog entries. Better Exposed Filters gives you
greater control over the rendering of exposed filters.
Why use this module? Because it provides a better user experience than
the default option. Try telling a client that they should click on an
option, then scroll to the next option and ctrl+click on it. Don't
just click 'cause you'll lose your first selection. Oh, and ctrl+click
again to unselect an option... Yeah, not user friendly.

additionally,

What else can you do with BEF?.
The BEF handbook page provides some basic recipes making exposed
filters a much better user experience.
Add help text for each exposed filter Tame long lists with scrollable
checkbox/radio button lists or select all/none links Provide instant
feedback by updating the View using AJAX whenever an exposed filter is
changed Use the jQuery Slider widget for greater-than, less-than or
in-between types of filters If you've got any ideas not covered on the
handbook page, add a feature request to the issue queue. You can also
rate this module on DrupalModules.