Some Post-demo Cleanups (#200)

* Remove redundant string

* Use placeholder avatar on home screen

* Add initial home screen ui test

* Fix settings screen PR remarks

* Remove UIKit alert from home screen sign out

* Remove UIKit alert from soft logout clear all data

* Add reference screenshots for home screen UI tests

* Formatting fixes

* Add clearing room method to client proxy

* Clear room proxies on screen dismiss

* Fix retain cycle in room view model

* Do not go into authentication state immediately

* Define sizes for user and room avatars on different screens

* Use defined avatar sizes everywhere

* Disable image disk caching

* Rename rounded corner shape

* Fix text color of placeholder avatars

* Fix PR reviews on formatted body text

* Fix merge conflict

* Remove shouldShowSenderDetails everywhere and just use it from inGroupState

* Remove redundant linter disablings

* Fix PR remarks

* Rename media provider size parameter

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -62,8 +62,6 @@ class ClientProxy: ClientProxyProtocol {
     private var slidingSyncObserverToken: StoppableSpawn?
     private let slidingSync: SlidingSync
     
-    private var roomProxies = [String: RoomProxyProtocol]()
-    
     let roomSummaryProvider: RoomSummaryProviderProtocol
     
     deinit {
@@ -158,10 +156,6 @@ class ClientProxy: ClientProxyProtocol {
     }
     
     func roomForIdentifier(_ identifier: String) -> RoomProxyProtocol? {
-        if let roomProxy = roomProxies[identifier] {
-            return roomProxy
-        }
-        
         do {
             guard let slidingSyncRoom = try slidingSync.getRoom(roomId: identifier),
                   let room = slidingSyncRoom.fullRoom() else {
@@ -172,7 +166,6 @@ class ClientProxy: ClientProxyProtocol {
             let roomProxy = RoomProxy(slidingSyncRoom: slidingSyncRoom,
                                       room: room,
                                       backgroundTaskService: backgroundTaskService)
-            roomProxies[identifier] = roomProxy
             
             return roomProxy
         } catch {
@@ -180,7 +173,7 @@ class ClientProxy: ClientProxyProtocol {
             return nil
         }
     }
-        
+
     func loadUserDisplayName() async -> Result<String, ClientProxyError> {
         await Task.dispatch(on: .global()) {
             do {