- Add CPaletteWindow::OnEraseBkgnd to avoid flickering.
- Add getColorBoxRect and drawColorBox helper functions to draw a color box.
- Add CPaletteWindow::DoHitTest helper function to do a hit test.
- Improve CPaletteWindow::OnPaint by using a memory bitmap.
- Improve readability of CMainWindow::alignChildrenToMainWindow.
CORE-18867