Feature request: specify location manually

[tildelowengrimm]

Hello, thanks for making this very useful tool.

Request: I'd really like to be able to pick a location or sensor manually rather than relying on the location API prompt.

Context: I'm always leery of granting location API permission, even though the app says that it's only used on my device. It's possible that the nearest sensor to me isn't great — it may be poorly installed and not representative of the actual air quality nearby. I also want to use aqi.wtf with Flotato, to create a compact standalone app window, and Flotato doesn't support the location API.