Re-add power meter for Audio, add Rect::shrink

include/util/math.hpp

@@ -297,6 +297,12 @@ struct Rect {
 		r.size = size.plus(delta.mult(2.f));
 		return r;
 	}
+	Rect shrink(Vec delta) {
+		Rect r;
+		r.pos = pos.plus(delta);
+		r.size = size.minus(delta.mult(2.f));
+		return r;
+	}
 };
 
 

src/Core/AudioInterface.cpp

@@ -278,11 +278,6 @@ struct AudioInterfaceWidget : ModuleWidget {
 		audioWidget->audioIO = &module->audioIO;
 		addChild(audioWidget);
 	}
-
-	void draw(NVGcontext *vg) override {
-		// HACK Bypass ModuleWidget::draw() as it currently only contains scissoring and power meters. This effectively disables drawing the power meter.
-		Widget::draw(vg);
-	}
 };