feat(ui): add CSimpleCheckbox::OnClick

src/ui/CSimpleCheckbox.cpp

@@ -70,6 +70,11 @@ void CSimpleCheckbox::LoadXML(XMLNode* node, CStatus* status) {
     }
 }
 
+void CSimpleCheckbox::OnClick(const char* btn, int32_t a3) {
+    this->SetChecked(this->m_checked == 0, 0);
+    this->CSimpleButton::OnClick(btn, a3);
+}
+
 void CSimpleCheckbox::SetChecked(int32_t checked, int32_t force) {
     if (checked == this->m_checked && !force) {
         return;

src/ui/CSimpleCheckbox.hpp

@@ -24,6 +24,7 @@ class CSimpleCheckbox : public CSimpleButton {
         virtual int32_t GetScriptMetaTable();
         virtual void LoadXML(XMLNode* node, CStatus* status);
         virtual void Enable(int32_t enabled);
+        virtual void OnClick(const char* btn, int32_t a3);
 
         // Member functions
         CSimpleCheckbox(CSimpleFrame* parent)