PLT-4403 Add server-based channel autocomplete, search and paging (#4585)

* Add more channel paging API

* Add channel paging support to client

* Add DB channel search functions

* Add API for searching more channels

* Add more channel search functionality to client

* Add API for autocompleting channels

* Add channel autocomplete functionality to the client

* Move to be deprecated APIs to their own file

* Final clean-up

* Fixes related to feedback

* Localization changes

* Add unit as suffix to timeout constants

api/user.go

@@ -2712,8 +2712,8 @@ func autocompleteUsersInChannel(c *Context, w http.ResponseWriter, r *http.Reque
 	searchOptions := map[string]bool{}
 	searchOptions[store.USER_SEARCH_OPTION_NAMES_ONLY] = true
 
-	uchan := Srv.Store.User().SearchInChannel(channelId, term, map[string]bool{})
-	nuchan := Srv.Store.User().SearchNotInChannel(teamId, channelId, term, map[string]bool{})
+	uchan := Srv.Store.User().SearchInChannel(channelId, term, searchOptions)
+	nuchan := Srv.Store.User().SearchNotInChannel(teamId, channelId, term, searchOptions)
 
 	autocomplete := &model.UserAutocompleteInChannel{}
 
@@ -2758,7 +2758,10 @@ func autocompleteUsersInTeam(c *Context, w http.ResponseWriter, r *http.Request)
 		}
 	}
 
-	uchan := Srv.Store.User().Search(teamId, term, map[string]bool{})
+	searchOptions := map[string]bool{}
+	searchOptions[store.USER_SEARCH_OPTION_NAMES_ONLY] = true
+
+	uchan := Srv.Store.User().Search(teamId, term, searchOptions)
 
 	autocomplete := &model.UserAutocompleteInTeam{}