20240109 New version

This version has the following new features

1. "Jump to unchecked" button in pair comparison mode for skipping to the first of the remaining unchecked images.
2. When a project is opened in pair comparison mode, the first of the remaining unchecked images will appear on the right.
3. Stage 4 is now optional. Users can choose to finish the project and export it at the end of Stage 3.