fix(header): hide MyProjects btn when 0 projects

app/scripts/components/header/templates/header.html

@@ -63,7 +63,7 @@
             <span class="hidden-md hidden-sm" data-translate>Login</span>
           </a>
         </li>
-        <li class="MyProjects" data-ng-if="hc.UserService.currentUser">
+        <li class="MyProjects" data-ng-if="hc.UserService.currentUser && hc.UserService.hasProjects()">
           <label class="MyProjects__label navbar-text">
             <input type="checkbox"
                    data-ng-change="hc.UserService.toggleFilter()"

app/scripts/components/user/user.services.ts

@@ -13,6 +13,7 @@ module ngApp.components.user.services {
     currentUser: IUser;
     userCanDownloadFiles(files: IFile[]): boolean;
     getToken(): void;
+    hasProjects(): boolean;
   }
 
   class UserService implements IUserService {
@@ -96,6 +97,14 @@ module ngApp.components.user.services {
       this.$rootScope.$broadcast("gdc-user-reset");
     }
 
+    hasProjects(): boolean {
+      if(!this.currentUser) {
+        return false;
+      }
+      var projects = _.get(this.currentUser.projects, 'gdc_ids', []);
+      return projects.length > 0;
+    }
+
     isUserProject(file: IFile): boolean {
       if (!this.currentUser) {
         return false;