New feature：
- download function is supported in RESTful integration mode
Improvement：
- Ww wl preset only for the currently selected sequence
- When the series are compared, other series are scrolled in real time (if the image has already been downloaded)
- In the server computing mode, the initial size of the DR image is unreasonable (too large), modified to fill the window.
Bug fix:
- Solve the problem that VE loading may fail due to direct switching from 3D to VE
