Changed database column to TEXT

- Changed message column in the log table to TEXT. Combined notification can be greater then 255 characters.

src/psm/Util/Install/Installer.php

@@ -569,6 +569,7 @@ class Installer {
 		$queries[] = "ALTER TABLE `".PSM_DB_PREFIX."servers` ADD COLUMN `last_output` TEXT NULL AFTER `last_error_output`;";
 		$queries[] = "ALTER TABLE `".PSM_DB_PREFIX."servers` ADD COLUMN `request_method` varchar(50) NULL AFTER `port`;";
 		$queries[] = "ALTER TABLE `".PSM_DB_PREFIX."servers` ADD COLUMN `post_field` varchar(255) NULL AFTER `pattern_online`;";
+		$queries[] = "ALTER TABLE `".PSM_DB_PREFIX."log` CHANGE `message` `message` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL;";
 		$queries[] = "INSERT INTO `".PSM_DB_PREFIX."config` (`key`, `value`) VALUES ('combine_notifications', '1');";
 		$this->execSQL($queries);
 		$this->log('Combined notifications enabled. Check out the config page for more info.');