add support for custom search engines.

[FarisZR]

Hi first, thanks for the awesome launcher!

i run my own searx instance, and it appears there is no way to add a custom search engine.

something like firefox mobile will do, it provides an option use custom search by specifying query URL.

[Joshndroid]

Can I please second this. Your already ahead with the ability to use searx I would like to use my own instance. Great app

[Darthagnon]

I would love an essential feature like this! Would also mean less maintenance down the road, as users can add whatever search engines they want, depending on engine api updates or privacy policy changes, without waiting or nagging the devs to add them...

[tiritibambix]

I'd also love to use my own searx instance !!