Client-side script: If an error is thrown in a Deferred callback, this error doesn't appear in the console, which makes debugging more difficult

If an error was thrown in Deferred callback, this error doesn't appear in console, which makes debugging more difficult

Error possibly was caused by this PR: 6d97370#diff-24d8a479ae56566c65690364aa2156fff7613fd38bd024153579f15d92b26f91L73, when deferred-like method .done was changed to promise-like .then

But on error in 'then' section of deferred (not promise) hides without appearing in console

Samples to try in dev console:

new Promise((resolve) => { window.r1 = resolve; }).then(() => { throw new Error('my error'); })
r1()

const d = new $.Deferred()
d.then(() => { throw new Error('my error'); })
d.resolve()

Workaround for jQuery Deferred objects:

$.Deferred.exceptionHook = function(x) {
  console.log(x); 
};

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