[Coquelicot] Coquelicot UI/UX improvements

Hello everyone,

I discovered the project on Debian and integrated it[1] into a Debian pure blend known as FreedomBox[2]. It looks like there hasn't been development on Coquelicot since December 2016.

The feature set is quite interesting and useful. I see a lot of potential for improvement in the UI and UX. The app can be made more mobile-friendly and support features like drag and drop to upload.

I'm working on making some UI/UX improvements to Coquelicot on my fork on Debian Salsa [3].

Links:

1. https://salsa.debian.org/freedombox-team/plinth/commit/ff9d061e98df79c77b25e...

2. https://freedombox.org/

3. https://salsa.debian.org/njoseph-guest/coquelicot