1. Fix the potential crash defect during version check when there is no network.
2. Fix the problem that the About dialog box cannot display the hyperlink in the Centos environment.
3. Add session grouping function, which can switch freely between grouping and list.
4. Add password encryption processing to prevent password leakage by directly viewing the password through SQLite.
5. The administrator management function has been added, which supports the start login and password anti check features.