[IMPROVEMENT] Move message history loading to REST API

[cardoso]

@RocketChat/ios

Closes #1516

[codecov]

Codecov Report

Merging #2455 into develop will increase coverage by 0.04%.
The diff coverage is 73.07%.

@@             Coverage Diff             @@
##           develop    #2455      +/-   ##
===========================================
+ Coverage     26.2%   26.24%   +0.04%     
===========================================
  Files          455      456       +1     
  Lines        16922    16936      +14     
===========================================
+ Hits          4434     4445      +11     
- Misses       12488    12491       +3

Impacted Files	Coverage Δ
Rocket.Chat/Extensions/DateExtension.swift	64.28% <ø> (ø)	⬆️
...Managers/Model/MessageManager/MessageManager.swift	23.76% <ø> (+5.71%)	⬆️
...cket.Chat/Controllers/Chat/MessagesViewModel.swift	29.75% <0%> (-0.45%)	⬇️
...et.Chat/API/Requests/Room/RoomHistoryRequest.swift	75% <75%> (ø)
Rocket.Chat/API/Clients/SubscriptionsClient.swift	65.16% <96.29%> (+5.56%)	⬆️
...anagers/Model/AuthManager/AuthManagerRecover.swift	36.36% <0%> (-60.61%)	⬇️
Rocket.Chat/Extensions/Models/AuthExtensions.swift	66.66% <0%> (-33.34%)	⬇️
...Chat/Models/Subscription/SubscriptionQueries.swift	70% <0%> (-30%)	⬇️
Rocket.Chat/Managers/PushManager.swift	24.13% <0%> (-10.35%)	⬇️
Rocket.Chat/Managers/AppManager.swift	36.47% <0%> (-4.12%)	⬇️
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0c16173...2355079. Read the comment docs.

[rafaelks]

Looks very solid, just one small thing. 👌

[rafaelks]

Looking great! 💯