Fix broken tests for project list and header

app/assets/javascripts/jobs/components/header.vue

@@ -31,7 +31,7 @@
         return !this.isLoading && Object.keys(this.job).length;
       },
       jobStarted() {
-        return this.job.started !== undefined;
+        return this.job.started;
       },
     },
     watch: {

app/assets/javascripts/projects_dropdown/components/projects_list_item.vue

@@ -28,7 +28,7 @@
         required: true,
       },
       avatarUrl: {
-        type: String,
+        type: [String, Object],
         required: true,
         validator(value) {
           return value === null || typeof value === 'string';