Alerts Dashboard: Add search/filter

[shua123]

[shua123]

Basic name search added to poi dashboard

[shua123]

Alerts POI Dashboard: name/nickname + main_div search
Alerts Trails Dashboard: name search

[shua123]

@versatilehuman What would you like for search/filtering on:

1. Global Alerts page?
2. All Alerts page?

[versatilehuman]

1. Don't need anything on Global Alerts. We've never had more than one at a time based on the use case.
2. It would be helpful to:

• Filter out non-active alerts (end date is in the past) so we can extend or remove.
• Filter closures vs. alerts

[shua123]

Added filtering to all alerts page 12925ad