Custom alert enhancements

[SupplyDepoo]

1. There should be an option to show custom alerts (from programmable speakers) as separate buttons, instead of grouped with all other custom alerts. Alerts that have the same icon and text should always be grouped regardless.
2. When there are multiple alerts grouped in one button, it should show the number of alerts on the button, just like it does with the built-in alerts (turrets engaged, taking damage, destroyed, etc).
3. When you click on an alert button for multiple alerts, it should cycle through each alert and center the location of the alert on the map. Currently it just brings you to a randomly picked alert. The cycling behavior already exists for missing construction materials. I'm suggesting applying it to all alert types with an associated location.