don't send reminders for deleted/hidden votes

reminder.py

@@ -13,7 +13,7 @@ import sqlite3
 conn = sqlite3.connect(DATABASE)
 c = conn.cursor()
 
-for vote in c.execute('select id, id_group, date_end, title from votes where is_open=1 and is_terminated=0').fetchall():
+for vote in c.execute('select id, id_group, date_end, title from votes where is_hidden=0 and is_open=1 and is_terminated=0').fetchall():
     date_end_vote = datetime.strptime(vote[2], "%Y-%m-%d")
     date_today = datetime.today()
     date_begin_reminder = date_end_vote + timedelta(days=-3)