Fix the integration tests. (#4084)

* Fix logging/alerts during OIDC cancellation.

- Cancelling from within the web view wasn't being handled since moving the UserIndicatorController into the presenter.
- The WAS canceledLogin error code is also used when the system cancels the login. When the system cancels there's a failure reason included in the error.

* Allow UI tests to tap on any point within a view.

* Make the homeserver optional in integration tests.

* Dismiss the keyboard after entering a username to reveal the password text field.

Do the same after entering the password field too, just in case.

* Add a loop while waiting for the WAS prompt to be shown.

ElementX/Sources/Screens/Authentication/OIDCAuthenticationPresenter.swift

@@ -43,13 +43,17 @@ class OIDCAuthenticationPresenter: NSObject {
             // Check for user cancellation to avoid showing an alert in that instance.
             if let nsError = error as? NSError,
                nsError.domain == ASWebAuthenticationSessionErrorDomain,
-               nsError.code == ASWebAuthenticationSessionError.canceledLogin.rawValue {
+               nsError.code == ASWebAuthenticationSessionError.canceledLogin.rawValue,
+               // If there's a failure reason then the cancellation wasn't made by the user.
+               nsError.localizedFailureReason == nil {
                 // No need to show an error here, just abort and return a failure.
                 await authenticationService.abortOIDCLogin(data: oidcData)
                 return .failure(.oidcError(.userCancellation))
             }
             
-            MXLog.error("Missing callback URL from the web authentication session.")
+            let errorDescription = error.map(String.init(describing:)) ?? "Unknown error"
+            MXLog.error("Missing callback URL from the web authentication session: \(errorDescription)")
+            
             userIndicatorController.alertInfo = AlertInfo(id: UUID())
             await authenticationService.abortOIDCLogin(data: oidcData)
             return .failure(.oidcError(.unknown))
@@ -62,6 +66,9 @@ class OIDCAuthenticationPresenter: NSObject {
         switch await authenticationService.loginWithOIDCCallback(url) {
         case .success(let userSession):
             return .success(userSession)
+        case .failure(.oidcError(.userCancellation)):
+            // No need to show an error here, just return the failure.
+            return .failure(.oidcError(.userCancellation))
         case .failure(let error):
             MXLog.error("Error occurred: \(error)")
             userIndicatorController.alertInfo = AlertInfo(id: UUID())