luci-app-simple-adblock: convert to js

luci-app-simple-adblock: convert to js

Thanks @dibdot, @jow-!

Signed-off-by: Stan Grishin <stangri@melmac.ca>
Update applications/luci-app-simple-adblock/htdocs/luci-static/resources/simple-adblock/status.js

Co-authored-by: Vasili Sviridov <vsviridov@exceede.com>
Signed-off-by: Stan Grishin <stangri@melmac.ca>
Thanks @dibdot, @jow-, @vsviridov!

* this includes changes made during review

Co-authored-by: Vasili Sviridov <vsviridov@exceede.com>
Signed-off-by: Stan Grishin <stangri@melmac.ca>
(cherry picked from commit 0b895b17940089f854221b340fafae83bcbb2a99)