Merge executeCallbacks and runCallback, simplify + optimize

    optionsChangedCallbacks.push(callback);

}

function runCallback(x, m) {

function executeCallbacks(queue, arg) {

    for (const callback of queue) {

        try {

        x(m);

            callback(arg);

        } catch (e) {

        console.error("error running callback", x, ":", e);

            console.error("error running callback", callback, ":", e);

        }

    }

}

function executeCallbacks(queue, m) {

    queue.forEach(function(x) {

        runCallback(x, m);

    });

}

var executedOnLoaded = false;