Handle account UI login UI progress better

* Show server down error message on 503 status
* Don't allow users to click another login option if another login is in progress
* Reset progress bar's visibility properly

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/extensions/Context.kt

@@ -127,6 +127,14 @@ fun Context.restartApp() {
     exitProcess(0)
 }
 
+fun Context.getEmptyActivityAnimation(): ActivityOptionsCompat {
+    return ActivityOptionsCompat.makeCustomAnimation(
+        this,
+        android.R.anim.fade_in,
+        android.R.anim.fade_out
+    )
+}
+
 fun Context.getEmptyActivityBundle(): Bundle? {
     return ActivityOptionsCompat.makeCustomAnimation(
         this,