Feature/resend email verify (#333)

* feat: Resend Email Verify

+ rework the whole concept, based on new table for email hashes
This make it possible that every email will work, not matter if first or last

* Nothing important: change variable name

* Change message

system/migrations/46-account_emails_verify.sql

@@ -0,0 +1,8 @@
+CREATE TABLE `myaac_account_emails_verify`
+(
+	`id` int NOT NULL AUTO_INCREMENT,
+	`account_id` int NOT NULL,
+	`hash` varchar(32) NOT NULL,
+	`sent_at` int NOT NULL DEFAULT 0,
+	PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARACTER SET=utf8mb4;