Bugfix aditional className for OsBarView

Implement position "top-left" for ImageView

Author: vash15

lib/ImageView.js

@@ -288,6 +288,12 @@ export default class ImageView extends BaseView {
 					marginTop  = 0;
 					marginLeft = displayWidth/-2;
 					break;
+				case 'top-left':
+					top        = 0;
+					left       = 0;
+					marginTop  = 0;
+					marginLeft = displayWidth/-2;
+					break;
 				case 'center':
 				default:
 					top        = 50;

lib/navigations/OsBarView.js

@@ -38,8 +38,9 @@ export default class OsBarView extends BarView {
 		this.viewstack = this.options.viewstack;
 		delete this.options.viewstack;
 
-		if (_.result(this.options, 'addClass')) {
-			this.$el.addClass( _.result( this.options, 'addClass' ) || '' );
+		let additionalClass = _.result(this.options, 'addClass');
+		if (additionalClass) {
+			this.$el.addClass( additionalClass || '' );
 		}
 
 		this.addEvents({