feature requests: command-line options, date entry

[archenemies]

I've used it for the first time and this is very useful!

Here are some feature requests I thought of:

1. (a) Be able to specify all the search constraints on the command line. (b) Before showing the list of flights, print an example command line that will repeat the same search. This gives users an easy way to save searches

2. When entering dates, "/" should move to the next field. Also, I would prefer for "up" and "down" arrows to move to the previous and next question, rather than incrementing and decrementing numbers. I don't know anyone who enters numbers in the terminal using arrows, I think it's always faster to type them. Also there is a problem where the number I type is not always recognized, I think this is because if I enter "5" for the day, and then change my mind and enter "7", it thinks I've typed "57" and ignores the "7".

One of the reasons I want to use this program is that I hate the date entry widgets on websites; they take a huge amount of time to load for some reason (my laptop is a bit old, but still), and they prevent me from just entering a date using my keyboard: 8/31/19 ... there, I typed it out in less than a second. It was slightly annoying that this program also tries to use a date widget of sorts, rather than just letting me type the date.