Fix #11663 

Adding `timeAgo` function to a `helpers` file so we can test it because just importing it from the previous file will cause an error `Template is not defined`. I reproduced the mentioned case on a test.

Render pretext as markdown when mrkdown_in contains "pretext"
Closes #3828

![image](https://user-images.githubusercontent.com/41751617/43274277-c5de8e30-90cc-11e8-8ba5-a57ad4af2571.png)

<!-- INSTRUCTION: Your Pull Request name should start with one of the following tags -->
<!-- [NEW] For new features -->
<!-- [FIX] For bug fixes -->
<!-- [BREAK] For pull requests including breaking changes -->

<!-- INSTRUCTION: Inform the issue number that this PR closes, or remove the line below -->
should close #10583

<!-- INSTRUCTION: Link to a https://github.com/RocketChat/docs PR with added/updated documentation or an update to the missing/outdated documentation list, see https://rocket.chat/docs/contributing/documentation/  -->

<!-- INSTRUCTION: Tell us more about your PR with screen shots if you can -->

[FIX] Message attachments was not respecting sort and lost spacing

* Fix default server language not being applied

* Always set user's language on localStorage

[FIX] Broken logo on setup wizard

* Fix regression

* Also update lastMessage

* code style fix

The login screen logo was not centering when displaying on a very small screen width (e.g. mobile device screens).

**Before:** 
![screen shot 2018-07-31 at 12 57 29 pm](https://user-images.githubusercontent.com/6295044/43474669-8269ccfc-94c1-11e8-9546-9d06d51c81a4.png)

**After:**
![screen shot 2018-07-31 at 12 57 18 pm](https://user-images.githubusercontent.com/6295044/43474681-8876e544-94c1-11e8-888e-65c14d614b3a.png)

* Fix stuck push notifications on db failure

* Change push send interval to 5s

Split the saveUser method into two, to reduce complexity

Merge master into develop & Set version to 0.69.0-develop

Release 0.68.0

Manual push by LingoHub User: Rodrigo Nascimento.
Project: Rocket.Chat

Made with  by https://lingohub.com

* Make message popup user mentions reactive again

* Add e2e test for user mentions in message popup

* Avoid call functions twice

* Prepare test data using the REST API

* Remove @watch from test description

* Logout before testing