improve termination sequence on windows, use patterns instead of textures as directory name

src/node.cpp

@@ -405,6 +405,9 @@ void Node::mouse_capture()
 
 void Node::mouse_release()
 {
+    if (!parent)
+        return;
+
     auto& c = root()->current_mouse_capture;
     auto& s = root()->m_capture_stack;
 
@@ -427,7 +430,10 @@ void Node::mouse_release()
 
 void Node::key_capture()
 {
-    root()->current_key_capture = this; 
+    if (!parent)
+        return;
+
+    root()->current_key_capture = this;
     m_key_captured = true;
 }