persistent resolver/protocol/provider selection; remove NyaLabs POW P…

…rovider

fix url to hostname parsing

display software display on title

change executescript to async mode

bump version; update English readme image

ci: use zip for windows release

fix: window freezes when moving/adjusting window while tracerouting

new feature #27: persistent grid height and option for it; bump version

support custom pow provider

fix linux keyboard event; update readme; bump version.