* Add escapeHTML helper

* Add unescapeHTML helper

* Move helpers to /lib

* Use the helpers

* feat/message-parsing

* Make escapeRegExp match its underscore.string counterpart

* Remove superfluous parameter

* Remove redundant function definition

* Work around oembed bug

* Refactor autolinker initialization

* Refactor autolinker initialization

* Refactor hexcolor initialization

* Refactor emoji initialization

* Refactor highlight-words initialization

* Refactor issuelinks initialization

* Refactor mentions initialization

* Refactor mapview initialization

* Remove trackSettingsChange module

* Remove some s.trim() usage

* Move renderMessageBody

* Move some renderMessage startup scripts

* Refactor katex startup

* Move some renderMessage startup scripts

* Move some spotify modules

* Fix reactivity

* Move spotify initialization

* Move markdown initialization

* Update Mocha configuration

* Rearrange renderMessageBody signature

* Move markdown template helpers

* Remove markdown template helpers

* Extract options from markdown

* Fix import

* Render message.location's mapview on message template

* Conditionally render message location

Co-authored-by: Guilherme Gazzo <guilherme@gazzo.xyz>

* Alert admins about apps on invalid state

* Implement ui for warning and error alerts in apps

* Open detail modal on viewing subscription info instead of the subscribe one.  Check license after close

* Implement ui for failed state of apps in detail screen

* Add failure alert support into appManage

* Show validation erros/warnings on app detail page

* Add status column to apps template

* Update uninstall modal

* Notify admins of disabled apps with valid licenses

* Update livechat widget to Meteor 1.8

* Replace synced-cron package

* Add break change regarding cordova app

* rocketchat:postcss parser and cssnext implementation

* convert forms, keygrames and reset to cssnext

* convert rtl to cssnext

* convert base.less to cssnext

* convert base.less to cssnext

* fix * selector

* try to fix tests

* add css browser support

* remove duplicated test

* remove duplicated get

* skip fileupload test

* fix tests

* skip fileupload tests

* Try to fix tests

* try to fix the test

* test

* vai que vai

* fix wrong commit

* try again

* try some more

* try to fix tests

* skip the failing tests

* skip last test

* fix stylelint

* stylelint

* fix height calc

* skip sweetalert tests again

* skip more sweetalert tests

* [WIP] Igloczek styles cleanup (#5354)

* WIP: Styles architecture cleanup

* Fix build

* Move the reset to css on client

* moving some CSS from api.addAssets to api.addFiles

* moving more files to built time compilers

* Restoring clearfix

* moving more files to built time compilers

* moving more files to built time compilers

* move fontello to theme package

* Renaming files to preserve git history

* Renaming files to preserve git history

* using min to preserve history

* Fix lint

* organizing

* Renaming files to preserve git history

* Renaming files to preserve git history

* Fix lint

* Fix lint

* Renaming files to preserve git history

* Moving another less file to cue compiled at build time

* Fix lint

* Moving another less file to be compiled at build time

* adding some part of lesshat into temp mixings

* Put transitions back with some temp redundant mixing

* commenting out unused mixings

* removed unused mixings from lesshat

* Fix lint