Katayama Hirofumi MZ 0839711566 [MSPAINT] Improve Undo/Redo and finishing tool (#4324) ...

- Fix Undo/Redo mechanism.
- Finish drawing when the tool is to be chanaged and when the file is to be saved.
- Add ToolBase::OnFinishDraw to virtualize finishing drawing.
- Extend bClearRedo parameter to ImageModel::Undo.
- Add ImageModel::DrawSelectionBackground and ImageModel::DeleteSelection methods.
- Fix some WM_PAINT message handling.
CORE-17969

2022-01-30 12:05:23 +09:00

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