Lock jquery-ui to 1.12.x

[glensc]

Revert "Bump jquery-ui from 1.12.1 to 1.13.0 (#1240)"

It's not compatible, for example view issue page has such errors on console:

jquery-ui.js?id=44a2af31b10434ff00c4:3226 Uncaught TypeError: $.uniqueSort is not a function
    at processClassString (jquery-ui.js?id=44a2af31b10434ff00c4:3226)
    at $.<computed>.<computed>._classes (jquery-ui.js?id=44a2af31b10434ff00c4:3239)
    at $.<computed>.<computed>._toggleClass (jquery-ui.js?id=44a2af31b10434ff00c4:3276)
    at $.<computed>.<computed>._addClass (jquery-ui.js?id=44a2af31b10434ff00c4:3264)
    at $.<computed>.<computed>._create (jquery-ui.js?id=44a2af31b10434ff00c4:15110)
    at $.<computed>.<computed>._create (jquery-ui.js?id=44a2af31b10434ff00c4:2834)
    at $.<computed>.<computed>._createWidget (jquery-ui.js?id=44a2af31b10434ff00c4:3032)
    at new $.<computed>.<computed> (jquery-ui.js?id=44a2af31b10434ff00c4:2789)
    at HTMLDivElement.<anonymous> (jquery-ui.js?id=44a2af31b10434ff00c4:2972)
    at Function.each (components.js?id=81f149179a79cc2f11e5:648)
    at jQuery.fn.init.each (components.js?id=81f149179a79cc2f11e5:270)
    at jQuery.fn.init.$.fn.<computed> [as progressbar] (jquery-ui.js?id=44a2af31b10434ff00c4:2964)
    at HTMLDivElement.<anonymous> (app.js?id=d0fd6bc6e7450e4c773c:26517)
    at Function.each (components.js?id=81f149179a79cc2f11e5:648)
    at jQuery.fn.init.each (components.js?id=81f149179a79cc2f11e5:270)
    at HTMLDocument.<anonymous> (app.js?id=d0fd6bc6e7450e4c773c:26515)
    at fire (components.js?id=81f149179a79cc2f11e5:1037)
    at Object.fireWith [as resolveWith] (components.js?id=81f149179a79cc2f11e5:1148)
    at Function.ready (components.js?id=81f149179a79cc2f11e5:433)
    at HTMLDocument.completed (components.js?id=81f149179a79cc2f11e5:103)

So such update should be postponed to future version.

[glensc]

Seems the method requires jquery 1.12:

• https://api.jquery.com/jQuery.uniqueSort/

[glensc]

Seems the issue here is that the compat file has been renamed:

• https://github.com/jquery/jquery-ui/blob/1.13.0/ui/jquery-patch.js

so, plan is to revert for 3.10.x versions to keep it stable, and not getting any more surprises, and do the upgrade in future eventum versions.