add findTabByKey to tabs

[howudodat]

Please add a findTabByKey to tabs. Sometimes I want to find a tab to enable / disable it or add some css or perform some other function. Something along the lines of below code would be very helpful

protected Tab findTabByKey(String key) {
	Optional<Tab> result = getTabs()
		.stream()
		.filter(t -> t.getKey().equalsIgnoreCase(key))
		.findFirst();

	return result.isPresent() ? result.get() : null; 
}