Minor improvements on notifications mechanism

Packages/ohif-core/client/components/bootstrap/dialog/form.html

@@ -14,7 +14,7 @@
                     {{#unless this.hideCancel}}
                         {{#button action='cancel'
                             disabled=this.cancelDisabled
-                            class=(concat 'btn btn-cancel ' (choose this.cancelClass 'btn-default'))
+                            class=(concat 'btn btn-cancel ' (choose this.cancelClass 'btn-secondary'))
                             tagAttributes=(extend this.tagAttributes data-dismiss='modal')
                         }}{{choose this.cancelLabel 'Cancel'}}{{/button}}
                     {{/unless}}

Packages/ohif-core/client/ui/notifications/notifications.js

@@ -104,4 +104,9 @@ Notifications.show = ({ template, data, text, style, timeout=5000, promise }) =>
     return notificationPromise;
 };
 
+Notifications.info = o => Notifications.show(Object.assign({}, o, { style: 'info' }));
+Notifications.success = o => Notifications.show(Object.assign({}, o, { style: 'success' }));
+Notifications.warning = o => Notifications.show(Object.assign({}, o, { style: 'warning' }));
+Notifications.danger = o => Notifications.show(Object.assign({}, o, { style: 'danger' }));
+
 OHIF.ui.notifications = Notifications;