configpanels: logic regarding dynamic-choices questions such as domain, user, should be handled by the core

app/src/helpers/yunohostArguments.js

@@ -110,24 +110,12 @@ export function formatYunoHostArgument (arg) {
       }
     },
     {
-      types: ['select'],
+      types: ['select', 'user', 'domain'],
-      name: 'SelectItem',
-      props: ['id:name', 'choices']
-    },
-    {
-      types: ['user', 'domain'],
       name: 'SelectItem',
       props: ['id:name', 'choices'],
       callback: function () {
+         if ((arg.type === 'domain') || (arg.type === 'user')) {
             field.link = { name: arg.type + '-list', text: i18n.t(`manage_${arg.type}s`) }
-        field.props.choices = store.getters[arg.type + 'sAsChoices']
-        if (value) {
-          return
-        }
-        if (arg.type === 'domain') {
-          value = store.getters.mainDomain
-        } else {
-          value = field.props.choices.length ? field.props.choices[0].value : null
          }
       }
     },

app/src/store/data.js

@@ -170,15 +170,6 @@ export default {
       return []
     },
 
-    usersAsChoices: state => {
-      if (state.users) {
-        return Object.values(state.users).map(({ username, fullname, mail }) => {
-            return { text: `${fullname} (${mail})`, value: username }
-        })
-      }
-      return []
-    },
-
     user: state => name => state.users_details[name], // not cached
 
     domains: state => state.domains,