Modified style overriding for search bar container

Changed the custom styling for the search bar container from being
additional styles applied ontop of the default styles to replacing
the default styles entirely.

Author: EricWiener

lib/src/components/GorgeousHeader/GorgeousHeader.js

@@ -56,7 +56,7 @@ class GorgeousHeader extends Component {
         <Text style={subtitleTextStyle || styles.subtitleTextStyle}>
           {subtitle}
         </Text>
-        <View style={[styles.searchBarStyle, searchBarStyle]}>
+        <View style={searchBarStyle || styles.searchBarStyle}>
           <Image
             style={styles.searchImageStyle}
             source={searchIcon || searchImage}