Feature Request: Make sortChildren locale-aware

[flack]

Expected and Actual Behavior

When I call node.sortChildren(null, true) on some entries with umlauts, I get the following result

what I would like to get is this:

It is actually very simple to achieve, I just need to change my code to look like this:

node.sortChildren(function(a, b) {
    return a.localeCompare(b);
}, true);

But I was wondering if it wouldn't be better if this was the default behavior, probably it would be enough to change this one line to use localeCompare instead:

fancytree/src/jquery.fancytree.js

Line 2324 in 4f519d0

return x === y ? 0 : x > y ? 1 : -1;