Feature: Load more history in user & searched user profile

[chenchanglew]

trafficstars

Summary

• add a new feature load more button to previous history.
• use websocket Transfer.LOAD_MORE_HISTORY to send message to backend.
• For searched user, create and return a new user profile. For self profile, update self.state.history, and refresh the history table.
• add related translation for "load more" in different languages.