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/UserSessionStore/UserSessionStore.swift

@@ -59,7 +59,7 @@ class UserSessionStore: UserSessionStoreProtocol {
         case .success(let clientProxy):
             return .success(UserSession(clientProxy: clientProxy,
                                         mediaProvider: MediaProvider(clientProxy: clientProxy,
-                                                                     imageCache: ImageCache.default,
+                                                                     imageCache: .onlyInMemory,
                                                                      backgroundTaskService: backgroundTaskService)))
         case .failure(let error):
             MXLog.error("Failed restoring login with error: \(error)")
@@ -77,7 +77,7 @@ class UserSessionStore: UserSessionStoreProtocol {
         case .success(let clientProxy):
             return .success(UserSession(clientProxy: clientProxy,
                                         mediaProvider: MediaProvider(clientProxy: clientProxy,
-                                                                     imageCache: ImageCache.default,
+                                                                     imageCache: .onlyInMemory,
                                                                      backgroundTaskService: backgroundTaskService)))
         case .failure(let error):
             MXLog.error("Failed creating user session with error: \(error)")