Begin of the insertion**Steps to reproduce**

- Create multilist CF and assign to Task
- Filter for Task and Multilist CF single value
- Create new WP
- Save WP

**Actual behavior**

Console error due to single HalResource being accessed as array.

application.js:1198 TypeError: Cannot read property 'forEach' of undefined
at WorkPackageChangeset.getLinkedValue (application.js:4894)
at application.js:4858
at application.js:1908
at Et (application.js:1890)
at application.js:1908
at Function.ru (application.js:1930)
at WorkPackageChangeset.mergeWithPayload (application.js:4851)
at WorkPackageChangeset.buildPayloadFromChanges (application.js:4879)
at WorkPackageChangeset.updateForm (application.js:4794)
at WorkPackageChangeset.save (application.js:4814)
(anonymous) @ application.js:1198
(anonymous) @ application.js:1198
$apply @ application.js:1198
(anonymous) @ application.js:1198
dispatch @ application.js:1091
g.handle @ application.js:1091End of the insertion