Enable 'x2' button to clone Plant Loops in HVAC Systems tab

[eringold]

Enhancement Request

@jmarrec gave us a working PlantLoop::clone method, but as far as I can tell it's not implemented in OSApp - clicking the 'x2' icon when viewing a plant loop in the HVAC Systems tab does nothing.

(v1.3.0+5faa91ea6b)

[jmarrec]

@eringold it's a very easy change,

OpenStudioApplication/src/openstudio_lib/HVACSystemsController.cpp

Lines 869 to 879 in 202dfee

	void HVACSystemsController::onCopySystemClicked() {
	auto loop = currentLoop();
	if (loop) {
	auto airloop = loop->optionalCast<model::AirLoopHVAC>();
	if (airloop) {
	auto clone = airloop->clone(loop->model());
	setCurrentHandle(toQString(clone.handle()));
	}
	}
	}

A great first issue, wanna give it a shot 😉?

[jmarrec]

Note you don't even need to check if it's an airloophvac anymore. If loop: loop->clone() is enough