Refactor styles and remove patternfly utility classes

src/components/Lookup/Lookup.jsx

@@ -136,7 +136,6 @@ class Lookup extends React.Component {
             </Button>
             <div className="pf-c-form-control">{this.wrapTags(value)}</div>
             <Modal
-              className="awx-c-modal"
               title={`Select ${lookupHeader}`}
               isOpen={isModalOpen}
               onClose={this.handleModalToggle}