use ranges::rotate to reorder clicked context

rts/Rml/Backends/RmlUi_Backend.cpp

@@ -354,16 +354,14 @@ void RmlGui::Update()
 	for (const auto& context : state->contexts) {
 		context->Update();
 	}
-
+
+	// move clicked context to top
 	if (state->clicked_context) {
-		auto context_pos = std::ranges::find(state->contexts, state->clicked_context);
-		if (context_pos != state->contexts.end()) {
-			// debug context is always to be on top
-			auto start = state->contexts.begin() + (state->debug_host_context ? 1 : 0);
-			if (context_pos != start) {
-				state->contexts.erase(context_pos);
-				state->contexts.insert(start, state->clicked_context);
-			}
+		// debug context is always to be at index 0 so it renders on top
+		auto start = state->contexts.begin() + (state->debug_host_context ? 1 : 0);
+		auto context_pos = std::ranges::find(start, state->contexts.end(), state->clicked_context);
+		if (context_pos != start && context_pos != state->contexts.end()) {
+			std::ranges::rotate(start, context_pos, context_pos + 1);
 		}
 		state->clicked_context = nullptr;
 	}