Add categories for control bindings

Common/UI/ViewGroup.cpp

@@ -1186,9 +1186,7 @@ CollapsibleSection::CollapsibleSection(const std::string &title, LayoutParams *l
 	heading_->OnClick.Add([=](UI::EventParams &) {
 		// Change the visibility of all children except the first one.
 		// Later maybe try something more ambitious.
-		for (size_t i = 1; i < views_.size(); i++) {
-			views_[i]->SetVisibility(open_ ? V_VISIBLE : V_GONE);
-		}
+		UpdateVisibility();
 		return UI::EVENT_DONE;
 	});
 }
@@ -1198,4 +1196,10 @@ void CollapsibleSection::Update() {
 	heading_->SetHasSubitems(views_.size() > 1);
 }
 
+void CollapsibleSection::UpdateVisibility() {
+	for (size_t i = 1; i < views_.size(); i++) {
+		views_[i]->SetVisibility(open_ ? V_VISIBLE : V_GONE);
+	}
+}
+
 }  // namespace UI