[iOS] Add an option to decrease size of 2FA entries

[jimmyjones865]

Is your feature request related to a problem? Please describe.
On my phone (iPhone SE 2020 / 4.7" screen), I can only see 5 entries at a time. Even if I only have ~ 20 entries, this leads to a lot of scrolling. In comparison, Mail app's inbox shows 12 emails per screen with sender and subject visible, and 9 emails if 1st line is previewed as well.

Describe the solution you'd like
Add an option to make entries smaller, allowing for more entries on screen. Trimming the padding on tiles should allow for 7-8 entries at least.

Describe alternatives you've considered
Being able to pin frequently used entries to top as suggested in #134 would already help reduce the need for scrolling.
Smaller tiles could also be linked to the already existing option "Show large icons [off]" or "Hide codes [off]". Currently, neither of these options change the size of the overall tile.

[lukasbestle]

I quite like the layout of Raivo OTP. It's very compact, yet clean.

[jimmyjones865]

I really appreciate the added 'pin' feature, thanks!
However, after the latest update the size of entries has increased even more. I can now only see 3 full and 1 half entry on my phone because the amount of white space has increased substantially. I did a quick and rough screenshot measurement that shows almost 60% of every entry's vertical size being white space, which is quite a lot.
In my opinion, a reduction of white space and/or option to ~ half the vertical size of entries would be great.
This is a full, uncropped screenshot on my 4.7" iPhone