Add module deselection to context menu.

include/app/RackWidget.hpp

@@ -71,6 +71,7 @@ struct RackWidget : widget::OpaqueWidget {
 	history::ComplexAction* getModuleDragAction();
 
 	void updateModuleSelections();
+	void clearModuleSelections();
 	int getNumSelectedModules();
 	std::list<ModuleWidget*> getSelectedModules();
 	void resetSelectedModulesAction();

src/app/ModuleWidget.cpp

@@ -1088,6 +1088,11 @@ void ModuleWidget::createSelectionContextMenu() {
 	int n = APP->scene->rack->getNumSelectedModules();
 	menu->addChild(createMenuLabel(string::f("%d selected %s", n, n == 1 ? "module" : "modules")));
 
+	// Deselect
+	menu->addChild(createMenuItem("Deselect", "", [=]() {
+		APP->scene->rack->clearModuleSelections();
+	}));
+
 	// Initialize
 	menu->addChild(createMenuItem("Initialize", RACK_MOD_CTRL_NAME "+I", [=]() {
 		APP->scene->rack->resetSelectedModulesAction();

src/app/RackWidget.cpp

@@ -653,6 +653,12 @@ void RackWidget::updateModuleSelections() {
 	}
 }
 
+void RackWidget::clearModuleSelections() {
+	for (ModuleWidget* mw : getModules()) {
+		mw->selected() = false;
+	}
+}
+
 int RackWidget::getNumSelectedModules() {
 	int count = 0;
 	for (widget::Widget* w : internal->moduleContainer->children) {