Fix an error on importing if there was a user by the same username on the server but different email

Manual push by LingoHub User: Gabriel Engel.
Project: Rocket.Chat

Made with  by https://lingohub.com

Fixes https://github.com/RocketChat/Rocket.Chat/issues/3037

The issue was that box attempted to resize before it was cleared. I added a callback that is called after `input.val = ''` which fixes it.
Relates to https://github.com/RocketChat/Rocket.Chat/issues/3037

Instead of listing them one by one.
Refactoring https://github.com/RocketChat/Rocket.Chat/pull/3032

* Continue work started by patcon in #2272 for importing slack again and again without duplicates. Currently errors out. Also fixed #2532 for Slack and HipChat.

* Ignore new slack channel format

* Add ability to upsert messages on sendMessage

* Show a better error for duplicated oembed records

Also adds missing translation keys

Embedding youtu.be shortened links did not have a video preview

- Edit buttons to save and cancel no longer submit the form
- "More channels" link has 100% width again
- Fix "New messages" button to overlaps date division
- Fix "Jump to recent messages" to 100% with again

Algumas strings estavam com a formatação markdown erradas

* RTL fix for main status menu direction

* Missing language entries (Copy, Quote)

* RTL fix for messgae attachment

* RTL fix for memebers list