Autocomplete tweaks: remove search blocker, fix debounce params #869

This is to address #869 (closed)

I changed the debounce parameters makes sure it doesn't fetch on the initial character but when you stop typing.

I removed the "don't search if we already have some results" as it can make it impossible to get the results you want, and added a list of recent queries to remove duplicate searches.

src/modules/users.js

@@ -428,10 +428,10 @@ const users = {
         store.commit('setUserForNotification', notification)
       })
     },
-    searchUsers (store, { query }) {
-      return store.rootState.api.backendInteractor.searchUsers({ query })
+    searchUsers ({ rootState, commit }, { query }) {
+      return rootState.api.backendInteractor.searchUsers({ query })
         .then((users) => {
-          store.commit('addNewUsers', users)
+          commit('addNewUsers', users)
           return users
         })
     },