0.7.1: Components refactor + use camelCase properties

Changelog

• Components refactoring to improve performance and maintainability
• Do not reset draft message when replying to a message
• Improve Electron compatibility
• Clean, bug and UI fixes

Breaking changes

• In messages prop, sender_id must be changed to senderId
• In messages prop, disable_actions must be changed to disableActions
• In messages prop, disable_reactions must be changed to disableReactions
• In rooms.users prop, last_changed must be changed to lastChanged