Update remaining strings for FTUE.

Include homeserver in view models/state as needed.
Pre-fill the user's display name as set by the server.

RiotSwiftUI/Modules/Authentication/Login/View/AuthenticationLoginScreen.swift

@@ -104,8 +104,7 @@ struct AuthenticationLoginScreen: View {
                                    onEditingChanged: usernameEditingChanged,
                                    onCommit: { isPasswordFocused = true })
             .accessibilityIdentifier("usernameTextField")
-            
-            Spacer().frame(height: 20)
+            .padding(.bottom, 7)
             
             RoundedBorderTextField(placeHolder: VectorL10n.authPasswordPlaceholder,
                                    text: $viewModel.password,