Clear selected sort, show zero values on sort, & sort by date

At the moment, the plugin does not support these options. We have noted and sent to our technical team about it. We will discuss about it. 

Here is the solution…
2) To sort by date simply add the below line of code after the “Sort by” option menu item…

<option <?php selected( $sort, 'date' ) ?> value="<?php echo esc_url( add_query_arg( array( 'date' => 'views' ) ) ) ?>"><?php _e( 'Date', 'dwqa' ) ?></option>

Optionally, remove the selected from <option selected disabled> and add selected=”selected” after “<option” above to have Date selected by default. Afterall, it already loads by default anyway!
2-b) For a further design change, I much prefer that the selected value is visible without clicking on the dropdown.  I’m using the flat template, so I deleted the dwqa-sort-by class in the template and wrote my own.
1) No longer need to clear sort as all sort options are covered, so you can easily return the default view.
3) My zero value filtering issue auto-magically resolved.  So not an issue anymore!