Assert ModuleWidget height when added to RackWidget. Round ModuleWidget width to nearest HP.

src/app/ModuleWidget.cpp

@@ -393,7 +393,7 @@ void ModuleWidget::setPanel(std::shared_ptr<Svg> svg) {
 	SvgPanel *svgPanel = new SvgPanel;
 	svgPanel->setBackground(svg);
 	addChild(svgPanel);
-	box.size.x = svgPanel->box.size.x;
+	box.size.x = std::round(svgPanel->box.size.x / RACK_GRID_WIDTH) * RACK_GRID_WIDTH;
 	panel = svgPanel;
 }
 

src/app/RackWidget.cpp

@@ -350,6 +350,7 @@ static void RackWidget_updateAdjacent(RackWidget *that) {
 void RackWidget::addModule(ModuleWidget *m) {
 	// Add module to ModuleContainer
 	assert(m);
+	assert(m->box.size.y == RACK_GRID_HEIGHT);
 	moduleContainer->addChild(m);
 
 	if (m->module) {