Need filters on Locations page in Admin webapp

[nupoorkhandelwal]

Motivation

When there are a lot of locations, it is hard to navigate the Locations page on the Admin webapp. Here are the common use cases required on this screen

1. Look up by name (currently possible)
2. Look up all children of a known location (currently possible)
3. List all blocks in a state, assuming a state has districts, and districts have blocks within them (currently not possible)

Generifying requirement 3, the locations page requires the ability to list a specific address level type based on an address level that is on a higher level, but not a direct parent.

Acceptance criteria

• There is a filter for "Parent Location" on the locations screen that is an autocomplete, and gets all children/grandchildren for that parent
• There is a filter for Type on the Locations screen that can be used to filter results by Type
• The above two filters work independently, and in conjunction with the search filter