Alert improvements

app/src/main/java/eu/faircode/email/FragmentAccount.java

@@ -1028,6 +1028,7 @@ public class FragmentAccount extends FragmentBase {
                 if (!synchronize) {
                     NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
                     nm.cancel("receive:" + account.id, 1);
+                    nm.cancel("alert:" + account.id, 1);
                 }
 
                 return false;

app/src/main/java/eu/faircode/email/Helper.java

@@ -401,6 +401,9 @@ public class Helper {
                         "This operation is not allowed on a closed folder".equals(ex.getMessage())))
             return null;
 
+        if (ex instanceof Core.AlertException)
+            return ex.getMessage();
+
         StringBuilder sb = new StringBuilder();
         if (BuildConfig.DEBUG)
             sb.append(ex.toString());

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -601,7 +601,7 @@ public class ServiceSynchronize extends LifecycleService {
 
                                     if (message != null && !message.startsWith("Too many simultaneous connections")) {
                                         NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
-                                        nm.notify("receive:" + account.id, 1,
+                                        nm.notify("alert:" + account.id, 1,
                                                 Core.getNotificationError(
                                                         ServiceSynchronize.this, "warning", account.name,
                                                         new Core.AlertException(message))