Missing node dialog revamp (#322)

* Basic rework of load workflow warning dialog

* Better style

* Add vue jest support

* Mock vue component in jest test

* nit

* Make dialog maximizable

tests-ui/globalSetup.ts

@@ -12,4 +12,10 @@ module.exports = async function () {
   HTMLCanvasElement.prototype.getContext = nop
 
   localStorage['Comfy.Settings.Comfy.Logging.Enabled'] = 'false'
+
+  jest.mock('@/services/dialogService', () => {
+    return {
+      showLoadWorkflowWarning: jest.fn()
+    }
+  })
 }