Refactor choosing error message templates

We moved the template logic in show_error.

Props @dzver.

js/liveblog-admin.js

@@ -2,23 +2,23 @@
 jQuery( function( $ ) {
 	var $meta_box = $( '#liveblog' ),
 		post_id = $( '#post_ID' ).val(),
-		show_error = function( message ) {
+		show_error = function( status, code ) {
+			var template = code? liveblog_admin_settings.error_message_template : liveblog_admin_settings.short_error_message_template,
+				message = template.replace( '{error-message}', status ).replace( '{error-code}', code );
 			$( 'p.error', $meta_box ).show().html( message );
 		};
 	$meta_box.on( 'click', 'button', function( e ) {
 		e.preventDefault();
 		var url = ajaxurl + '?action=set_liveblog_state_for_post&post_id=' + encodeURIComponent( post_id ) + '&state=' + encodeURIComponent( $( this ).val() ) + '&' + liveblog_admin_settings.nonce_key + '=' + liveblog_admin_settings.nonce;
 		$( '.inside', $meta_box ).load( url, function( response, status, xhr ) {
-			var message;
 			if ( status === 'success') {
 				return;
 			}
 			if (xhr.status && xhr.status > 200) {
-				message =  liveblog_admin_settings.error_message_template.replace( '{error-code}', xhr.status ).replace( '{error-message}', xhr.statusText );
+				show_error( xhr.statusText, xhr.status );
 			} else {
-				message = liveblog_admin_settings.short_error_message_template.replace( '{error-message}', status );
+				show_error( status );
 			}
-			show_error(message);
-			} );
+		} );
 	} );
 } );