Add GenericClickHandler that allows right clicks.

ui/click_handler.h

@@ -114,16 +114,16 @@ class LeftButtonClickHandler : public ClickHandler {
 
 };
 
-class LambdaClickHandler : public ClickHandler {
+class GenericClickHandler : public ClickHandler {
 public:
-	LambdaClickHandler(Fn<void()> handler)
+	GenericClickHandler(Fn<void()> handler)
 	: _handler([handler = std::move(handler)](ClickContext) { handler(); }) {
 	}
-	LambdaClickHandler(Fn<void(ClickContext)> handler)
+	GenericClickHandler(Fn<void(ClickContext)> handler)
 	: _handler(std::move(handler)) {
 	}
-	void onClick(ClickContext context) const override final {
-		if (context.button == Qt::LeftButton && _handler) {
+	void onClick(ClickContext context) const override {
+		if (_handler) {
 			_handler(context);
 		}
 	}
@@ -133,6 +133,18 @@ class LambdaClickHandler : public ClickHandler {
 
 };
 
+class LambdaClickHandler : public GenericClickHandler {
+public:
+	using GenericClickHandler::GenericClickHandler;
+
+	void onClick(ClickContext context) const override final {
+		if (context.button == Qt::LeftButton) {
+			GenericClickHandler::onClick(std::move(context));
+		}
+	}
+
+};
+
 void ActivateClickHandler(
 	not_null<QWidget*> guard,
 	ClickHandlerPtr handler,