[#3156] Add setting to show attack roll result (AC check) card to players

[pbasov]

Closes #3156

[pbasov]

@krbz999 Thanks for quick review (were hoping to grab a built minjs, but you don't build them for PRs). Fixed the code, tested on my own instance, works as intended without reload, PTAL.

Player (left) side, GM side (right) False/True:

Settings page:

~~Can be improved by an addional logic to hide/show precise AC number for players, but i think it's a separate commit.~~ Actually, let me figure out a way to hide AC, would make the feature complete.

[pbasov]

GM and Player sides:

Settings page:

@krbz999 please take a look