* Fix the error of onClick with scrollToBottomArrow prop

* MM-13107 Add backwards compatibility for metadata

* Fix review comments

* MM-11692 Add infinite scroll

  * Use react new lifecycle methods.
  * Decrease box value variable for layout trashing.
  * Add a fallback to manual retry after a 3 auto retries
  * Update loader styling
  * Load posts when half of clientHeight
  * Remove requestAnimationFrame for load posts API
  *  Remove required for dimensions as it can be not present for local messages
  * Add absolute position back
  * Remove couple of scroll corrections
  * Correct scroll when last message is posted
  * Fix for no dimensions
  * Add a fix to check for images object in OG data

* Add pluggable component for bottom of team sidebar

* Add ability for web app plugins to deinit

* Add pluggable component for channel sidebar header

* Allow ephemeral messages to have overriden icons

* Fix system message icons and new line separator from bot posts

* Prevent collisions for plugin WS handlers and clean-up when removed

* Add ability for plugins to register reconnect handlers

* Update snapshots

* Minor fixes

* MM-10812 Attempt to load posts to fill screen

* Prevent loading too many pages

* Updating names

* consolidate system messages (add/join/leave/remove from channel/team)

* updated per comments

* make users unique per system message type and add priority to fix order in showing messages

* updated per comments

* rebase to latest and fix minor issues

* updated per comment

Signed-off-by: Saturnino Abril <saturnino.abril@gmail.com>

* Easy dependancies upgrade.

* Redux upgrade to 4

* React codemod to change to UNSAFE

* Upgrade eslint.

* Being more specific with disabled lines.

* Fixing tests.

* Downgrading image-webpack-loader because latest is broken.

* add eslint-plugin-header, and --fix all

While the checking feature of this plugin seems to work great, its --fix
will sometimes removing leading comments when the license header doesn't
match. I've hand-edited the over-zealous removals, so this won't be an
issue going forward except for new files with missing headers but
leading comments.

* fixes from latest master changes

* latest changes from master

* MM-9635: expunge global mm_(license|config) from channel intro message component

* MM-9635: pass isLicensed to isChannelAdmin

* MM-9635: remove unused getWebsocketPort

* MM-9635: pass enableEmailBatching to getEmailInterval

* MM-9635: pass license and config to canDownloadFiles

* MM-9635: pass license and config to checkIfMFARequired

* update eslint's `comma-dangle` rule to `always-multiline`

* Invoke `yarn fix` to adopt the updated eslint rules. No other changes are included.

* Update initial scrolling on post list

* Add loading indicator for top of channel until inital reqeust completes

* PLT-8496 Fix shift+Up to open reply RHS (#554)

* Fix shift+Up to open reply RHS

* Feedback review

* Remove unsued vars

* Fix FF in mobile view (#559)

* Fix FF in mobile view

* show error in console when changeCss fails

* Fix hover and unmounting issues with post_info (#562)

* Release 4.6 (#567)

* PLT-8507 - Reply icon not inline in firefox

* PLT-8504 - Scroll bar cutting of File thumbnails

* Fix many places where components error when missing props (#571)

* Based on release-4.6 (#566)

This PR redirects a user to the town square channel before unsubscribing them from the current channel.

* RN-8502 Show errors on Join Another Team page (#563)

* fix incorrect channel notification settings when switching teams and reset active section whenever channel notification modal is closed or hidden (#560)

* [PLT-8424] Do not show add-user-to-channel ephemeral message at center (#533)

* do not show add-user-to-channel ephemeral message at center

* send add to channel ephemeral post via client app

* PLT-8510: Feature checks for older webkit support of Performance API. (#557)

* PLT-8510: Feature checks for older webkit support of Performance API.

* PLT-8510: Added global performance object for tests.

* Fixed autoFocus issue with delete modal after edit (#572)

* Fixed autoFocus issue with delete modal after edit

* check style fixes

* conditional check

* update copyTheme string on handleColorChange (#580)

* PLT-8335 fixing issue with iOS classic (#579)

* PLT-8335 fixing issue with iOS classic

* Fixing eslint errors

* PLT-8522 Added clientside rendering for removed from team messages (#576)

* PLT-8522 Added clientside rendering for removed from team messages

* Fixed extra quotation mark

* PLT-8521 - Fixing overlay on sidebar (#581)

* Fix merge

* do not show add-user-to-channel ephemeral message at center

* send add to channel ephemeral post via client app

* Remove updateWindowDimensions references

* Add resize event listners for render trigger

* Fix spelling of Dimensions

* Fix setDimensions spelling in post_time component

* Remove shouldComponent update from search_results_item as
 it is a pureComponent

* Move "message below" bubble to be set after update

* Only check if not in focused mode

* Fix jenkinsfile

* PLT-7977 - Emoji icon overlapping in edit modal

* PLT-7965 - Channel header underline fix

* PLT-7985 - Fixing more unreads indicator text

* PLT-7282 - Adding @ sign before username in modals

* PLT-6828 - Hiding url links for clickable elements

* Minor fixes

* PLT-7928 - Pinned post button consitent pos

* PLT-8000 - Long DM not truncating

* Fixing minor header width issue

* PLT-8033 - Fixing manage members button on mobile

* Support new mattermost-redux action returns

* Some fixes

* Fix open DM/GM

* Fix adding a command

* fix unjoined-channel permalinks

* rm redundant fix (already fixed in #124)

* reorganize imports and add eslint rules

* rebase and fix conflicts

* fix channel loading animation

* eslint fix

* Some final release fixes

* Fix team switching with image in channel bug

* Updates to new message below indicator

* Fixes per feedback