Add Reset Selection button to district filter

[TylerMatteo]

Acceptance Criteria

• Filter by District section has new "Reset Selection" clickable text (designs)
• When user clicks Reset Selection, reset dropdown boxes to default selections, query parameters should clear
• When user clicks Reset Selection, geography filter should be cleared. App should reset to default path. This includes clearing selected project if any
• When user clicks Reset Selection, map should reset to default lat/long/zoom

[TylerMatteo]

@horatiorosa do you feel like you have enough info to work on this after this morning's call? I know the code for this will eventually interact with the other filter resets but try not to get too hung up on that for now - see if you can implement this as-is and we'll incorporate the other functionality incrementally.

[horatiorosa]

Yes I can get going, I don't need to wait until Jessica finishes the redesign (links instead of buttons)