[Feature]: Add shortcut to split current tab

[devynspencer]

Looks like the API straight-up doesn't support/expose this functionality yet. zzzz

[devynspencer]

Might have an example here, but if so, the API for splitting a tab is not intuitive at all.

function splitSelected(parent, id) {
    var obj = selected;
    var tab_ids = obj.list;
    if (id) {
        id = parseInt(id, 10);
    }
    if (tab_ids.length > 0 && obj.type === 'Tab') {
        if (!parent) {
            for (var j = 0; j < tab_ids.length; j++) {
                var t_id = tab_ids[j];
                chrome.tabs.get(t_id, function (tab) {
                    chrome.windows.get(tab.windowId, function (win) {
                        chrome.windows.create({
                            url: tab.url,
                            incognito: win.incognito
                        }, function () {
                            chrome.tabs.remove(id);
                        });
                    });
                });
            }
        } else {
            var old_win_id, temp = [],
                tab;
            chrome.windows.get(id, function (new_win) {
                for (var i = tab_ids.length - 1; i >= 0; i--) {
                    old_win_id = parseInt($('#' + tab_ids[i]).parent().parent().parent().attr('id').split('_')[0], 10);
                    temp.push(tab_ids[i]);
                    chrome.windows.get(old_win_id, function (old_win) {
                        tab = temp.pop();
                        if (new_win.incognito || old_win.incognito) {
                            chrome.tabs.get(tab, function (old_tab) {
                                chrome.tabs.create({
                                    windowId: new_win.id,
                                    url: old_tab.url
                                });
                                chrome.tabs.remove(tab);
                            });
                        } else {
                            chrome.tabs.move(tab, {
                                windowId: id,
                                index: -1
                            }, function () {
                                loadData();
                            });
                        }
                    });
                }
            });
        }
    }
}