EDD 2.0 - Show discount field by default

gistfile1.php

<?php

/**
 * Unhook default EDD discount field
*/
remove_action( 'edd_checkout_form_top', 'edd_discount_field', -1 );

/**
 * Add our own callback for the discount field, keeping the same CSS as before
*/
function sumobi_edd_discount_field() {

	if( isset( $_GET['payment-mode'] ) && edd_is_ajax_disabled() ) {
		return; // Only show before a payment method has been selected if ajax is disabled
	}

	if ( edd_has_active_discounts() && edd_get_cart_total() ) :

		$color = edd_get_option( 'checkout_color', 'blue' );
		$color = ( $color == 'inherit' ) ? '' : $color;
		$style = edd_get_option( 'button_style', 'button' );
?>
		<fieldset id="edd_discount_code">
			
			<p id="edd-discount-code-wrap">
				<label class="edd-label" for="edd-discount">
					<?php _e( 'Discount', 'edd' ); ?>
					<img src="<?php echo EDD_PLUGIN_URL; ?>assets/images/loading.gif" id="edd-discount-loader" style="display:none;"/>
				</label>
				<span class="edd-description"><?php _e( 'Enter a coupon code if you have one.', 'edd' ); ?></span>
				<input class="edd-input" type="text" id="edd-discount" name="edd-discount" placeholder="<?php _e( 'Enter discount', 'edd' ); ?>"/>
				<input type="submit" class="edd-apply-discount edd-submit button <?php echo $color . ' ' . $style; ?>" value="<?php echo _x( 'Apply', 'Apply discount at checkout', 'edd' ); ?>"/>
				<span id="edd-discount-error-wrap" class="edd_errors" style="display:none;"></span>
			</p>
		</fieldset>
<?php
	endif;
}
add_action( 'edd_checkout_form_top', 'sumobi_edd_discount_field', -1 );

/**
 * Sprinkle a little bit of Javascript to override edd-checkout-global.js and show our field again
*/
function sumobi_edd_discount_field_js() {
	?>
	<script>
		jQuery(document).ready(function($) {
			$('#edd-discount-code-wrap').show();
		});
	</script>
<?php }
add_action( 'wp_footer', 'sumobi_edd_discount_field_js' );