e remaining string contains an <code>=</code> character then the alert tag key will
be the string up to the first <code>=</code> and the value will be the rest of the string.
If there is no <code>=</code> then the key will be the string after the prefix and the value will be blank.<br>
A History tag of <code>ALERT-TAG:AAA=BBB</code> will result in an Alert tag with a key of <code>AAA</code> 
and a value of <code>BBB</code>, while a History tag of <code>ALERT-TAG:CCC</code> will result in an 
Alert tag with 