Strings are not url-encoded within filters

[rklipach]

I'm not sure is it a bug or some kind of misconfiguration on my side - could you please clarify it?

When I'm using built-in grid-filters or global search - string are not going to be url-encoded before putting into HTTP request.

i.e. when I'm putting a+b it is going to be converted to a%20b instead of a%2Bb,
when I'm putting a&b it is going to be converted into 2 parameters a&b= instead of single parameter with value a%26b.

Please, let me know if I described the issue unclearly and you need more details.

Thank you in advance!

[rklipach]

@tabuna

Please, propagate to 10.x branch too. Thank you in advance!