DoOrDelay Utility function

There are several occurrences of this particular functionality, so I'd like to propose adding the following utility function.

If you do a search for `getWindow().setTimeout` you will see that this function is appropriate for the majority of cases that `window.setTimeout` is used.

It is fairly self-explanatory:

```
/**
* @param {number} delay
* @param {function} callback
* @param {function} elseCallback (optional)
* @returns { any }
*/
function doOrDelay(callback, delay, elseCallback) {
if (delay && delay > 0) {
return getWindow().setTimeout(callback, delay);
} else if (elseCallback) {
return elseCallback();
} else {
return callback();
}
}
```