message: GLCursor: fixes an OpenGL warning
diff: @@ -128,7 +128,7 @@ GLCursor::GLCursor(QSize _size,
  // setup vertices
  vbo_.create();
  vbo_.bind();
  - vbo_.setUsagePattern(QOpenGLBuffer::UsagePattern::StaticDraw);
  + vbo_.setUsagePattern(QOpenGLBuffer::UsagePattern::DynamicDraw);
  vbo_.allocate(12 * sizeof(GLfloat));
  vao_.create();
  