Enable having a list of frequently used sqlite3 paths/binaries

[polyrand]

Typing the full path to the SQLite file can be tedious. It would be great to offer a good autocomplete list with options based on past inputs. Turning autocomplete="on" in the <input> or <form> elements hasn't worked for now. I'm thinking about using instead.

Using datalist has a few advantages:

• It can be modified using JS
• It looks good on mobile

I'm thinking the configuration screen (#3) should also let the user add/remove common paths for the suggestions. I could also link each remote host with a list of common paths. But initially I will just have a single list of common paths.