LibWeb: Use the correct DOM node when moving text cursor with mouse

We should use the DOM node returned by the TextCursor hit test,
and not the one we got from the earlier Exact hit test.

Userland/Libraries/LibWeb/Page/EventHandler.cpp

@@ -197,7 +197,7 @@ bool EventHandler::handle_mousedown(const Gfx::IntPoint& position, unsigned butt
         if (button == GUI::MouseButton::Left) {
             auto result = layout_root()->hit_test(position, Layout::HitTestType::TextCursor);
             if (result.layout_node && result.layout_node->dom_node()) {
-                m_frame.set_cursor_position(DOM::Position(*node, result.index_in_node));
+                m_frame.set_cursor_position(DOM::Position(*result.layout_node->dom_node(), result.index_in_node));
                 layout_root()->set_selection({ { result.layout_node, result.index_in_node }, {} });
                 m_in_mouse_selection = true;
             }
@@ -262,7 +262,7 @@ bool EventHandler::handle_mousemove(const Gfx::IntPoint& position, unsigned butt
         if (m_in_mouse_selection) {
             auto hit = layout_root()->hit_test(position, Layout::HitTestType::TextCursor);
             if (hit.layout_node && hit.layout_node->dom_node()) {
-                m_frame.set_cursor_position(DOM::Position(*node, result.index_in_node));
+                m_frame.set_cursor_position(DOM::Position(*hit.layout_node->dom_node(), result.index_in_node));
                 layout_root()->set_selection_end({ hit.layout_node, hit.index_in_node });
             }
             if (auto* page = m_frame.page())