release-electron-3.0.3

0. The significant changes introduced in version 3.0 introduced some bugs. Two months of beta testing still cannot avoid them. We apologize for the recent frequent updates. Please bear with us.
1. Fix: Duplicate folder bug in the QuickPaste plugin. by @GeoffreyChen777
2. Fix: Some RSS-related bugs. by @GeoffreyChen777
3. Fix: A file moving bug. by @GeoffreyChen777
4. Fix: A macOS bug when the window was closed by Cmd+W. by @GeoffreyChen777
5. Fix: A sync bug for partition-based database. by @GeoffreyChen777
6. Enhance: Some Chinese translation issues. by @Rccubc