Ensure consistent naming of title fields (#134)

Merge branch 'master' into fix/title-fields

Change task text field to title

Change namespace name field to title

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/134

src/models/namespace.js

@@ -23,7 +23,7 @@ export default class NamespaceModel extends AbstractModel {
 	defaults() {
 		return {
 			id: 0,
-			name: '',
+			title: '',
 			description: '',
 			owner: UserModel,
 			lists: [],