Eventlog Application Alert in it's Severity Colour (#11660)

* Eventlog Application Alert in it's Severity Colour

* use 'use'

* enums

* enum key list

* typo fix

LibreNMS/Enum/Alert.php

@@ -33,4 +33,12 @@ abstract class Alert
     const NOTICE = 3;
     const WARNING = 4;
     const ERROR = 5;
+
+    const SEVERITIES = ['unknown' => self::UNKNOWN,
+                        'ok'      => self::OK,
+                        'info'    => self::INFO,
+                        'notice'  => self::NOTICE,
+                        'warning' => self::WARNING,
+                        'error'   => self::ERROR,
+                       ];
 }