[FIX] Update Message based on URL, attachments and reactions changes and also fixed bug where user wouldn't be present in database

[rafaelks]

@RocketChat/ios

• Take in consideration changes of urls, attachments and reactions to differentiate a message object;
• Save user in database on mapping message to make sure user will exist later (fixes the bug where some user's messages would never appear on the screen);
• Update Firebase app to the correct production one;

[cardoso]

👍

[codecov]

Codecov Report

Merging #2305 into develop will increase coverage by 0.2%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           develop    #2305     +/-   ##
==========================================
+ Coverage    25.98%   26.18%   +0.2%     
==========================================
  Files          433      433             
  Lines        15876    15885      +9     
==========================================
+ Hits          4125     4160     +35     
+ Misses       11751    11725     -26

Impacted Files	Coverage Δ
Rocket.Chat/Models/Message/UnmanagedMessage.swift	9.52% <ø> (ø)	⬆️
...t.Chat/Models/Attachment/UnmanagedAttachment.swift	0% <ø> (ø)	⬆️
...cket.Chat/Models/Mapping/MessageModelMapping.swift	83.14% <100%> (+1.89%)	⬆️
...ontrollers/Base/Main/MainSplitViewController.swift	45% <0%> (-7.5%)	⬇️
...Chat/Controllers/Chat/MessagesViewController.swift	30.3% <0%> (-3.54%)	⬇️
Rocket.Chat/Managers/AppManager.swift	46.3% <0%> (+4.69%)	⬆️
Rocket.Chat/Managers/PushManager.swift	34.48% <0%> (+10.34%)	⬆️
...Chat/Models/Subscription/SubscriptionQueries.swift	100% <0%> (+30%)	⬆️
...anagers/Model/AuthManager/AuthManagerRecover.swift	96.96% <0%> (+60.6%)	⬆️

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