[Polling stations] View polling stations list per county

[aniri]

As an admin user I want to be able to view the list of Polling stations in the application.

Backend implemented in code4romania/monitorizare-vot#255

UI available here: https://www.figma.com/file/61NHR7fwmV1Dsv4Pb6F8T7/code4ro_mv_user-management_2018.04.21-(Copy)?node-id=754%3A0

Depends on #215
Related to #216

When clicking on a county in the list or using the edit county option, a separate page should open that displays to county info and the polling station list for that county (use GET api/v2/polling-station).

Permissions:

• master admin (organiser) can view and also edit counties and polling stations
• ngo admin (ngoadmin) can only view the counties and polling stations lists

Needed functionalities:

• show the paginated list of polling stations per county
• display an empty state if no polling stations are returned by the API
• add the possibility of filtering polling stations by number (exact number and range)

Polling stations data model:

• id, address, coordinates, adminTerritoryCode, IdCounty, TerritoryCode, Number

Please use bootstrap classes as much as possible and avoid adding custom css styles to keep the codebase clean & consistent. The new UI should be as similar as possible to the one in figma, not pixel perfect.

Also, make sure all texts are extracted in translation files.