feat: show namespace of related tasks if they are different than the current one (#923)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/923
Reviewed-by: dpschen <dpschen@noreply.kolaente.de>
Co-authored-by: konrad <k@knt.li>
Co-committed-by: konrad <k@knt.li>

src/store/modules/namespaces.js

@@ -76,8 +76,13 @@ export default {
 		},
 	},
 	getters: {
-		getListAndNamespaceById: state => listId => {
+		getListAndNamespaceById: state => (listId, ignorePseudoNamespaces = false) => {
 			for (const n in state.namespaces) {
+				
+				if(ignorePseudoNamespaces && state.namespaces[n].id < 0) {
+					continue
+				}
+				
 				for (const l in state.namespaces[n].lists) {
 					if (state.namespaces[n].lists[l].id === listId) {
 						return {