Clear Button in Search form

I am using the short-code given for the search and I am wondering in what file the clear button is located so I may disable.. I have searched all the files and cannot for the life of me find it. The clear button on my testing sight brings up all data in a list. It is accepting a value of null, and I cant have that. I am familiar with PHP but I cannot find where to modify this. By the way love this program! Thanks!

• This topic was modified 6 years, 7 months ago by tlmarion13.