Make alert severity counts on nav bar into filters

Hey Mosh, 

This is actually an improvement already planned for the Alerts page as part of the new UI! I like the idea of having the main Alert Icon item remove all the filters and reset the view. 

One question I have is, would you expect clicking on the main Alert Icon to remove the severity filters and return the user:

1. The default alert view without any filters applied (ie sorting by "Began - Most Recent" 

2. Previous configuration of applied filters set on the alerts page for a particular user (ie "SDT: No, ACK: No, etc..)

Thanks!