[Feature] Update airport view to show last visit / next visit

[jonlarson13]

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

I just started using AirTrail (love it BTW) and noticed that when you have multiple flights in the future, when you view the airport it says your Last Visit is the day you arrive from your futuremost flight.

Problem

So if I have flights:
June 1 AAA > BBB
June 5 BBB > AAA

July 10 AAA > BBB
July 13 BBB > AAA

July 29 AAA > CCC
Aug 3 CCC > AAA

It says my last visit to AAA is Aug 3 - in the future and far past my actual last visit of June 5, and not appropriately representing that my next visit to AAA will actually be July 10, in fact there is currently no functionality of "next visit".

Proposal

I'm working on a PR that changes the functionality of viewing an airport to include Last Visit that actually shows the last time you've visited that airport and Next Visit to show when you will next be there.

Current functionality:

Last visit = July 22. Hasn't actually happened yet, real last visit was June 3

Proposed functionality in my PR:

Add Next Visit that shows the next time you will be at that airport, change Last Visit to correctly state the last time you visited that airport - even if you have upcoming flights.

Airports that you've never been to will simply say Next Visit:

And airports you have no upcoming visits to will only say Last Visit:

Due to the length of adding both Next Visit and Last Visit, I had to separate the last/next visit onto it's own line from # Airlines and # routes. To me, it looked the cleanest by having the visits first since it's going to be the longer line when it has both a next and last visit.

I'm open to feedback on changing/adjusting styling or functionality how you see fit. I'm also thinking about adjusting the styling in the departure/arrivals list to separate future from past flights but will open a seperate issue/PR for that as long as you have no objections.

[jonlarson13]

PR #640