Feature/smallCleanup

[MyElectricSheep]

1/ Possible cities of residence are now sorted alphabetically ( A -> Z ) when a user signs up or edit their profile.

2/ Small cosmetic changes (map height on main page, way city/country names are displayed on the pins / user profile / modals)

3/ Fix location issues:

• Remove duplicate cities from the citiesOptions array, fix React duplicate key issue, prevents adding an index in the DB
• Prevent throwing an error if no geolocation data is found when registering/editing (+ blank out lat/lng fields on a user's db entry if there was something held there previously)

[vercel[bot]]

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