Version 3.0.0 alpha 2

GUI

• Add missing 'sys' module. Ref #3373
• Upgrade dev dependencies
• Dot not allow "no border" style for line items
• Use "none" for solid line style in drawing items
• Implement new option (Delete All) to contextual menu in "Console" dock. Fixes #3325
• Fix editing Docker container config generates exception and empty config. Fixes #3371
• Fix 2560x1440 resolution for Docker container
• Fix cannot detect images by default when trying to upload them in the Image Manager. Fixes #3367
• Fix unable to set VNC console resolution. Fixes #3365

Server

• Add web-ui v3.0.0a2
• Upgrade FastAPI to v0.82.0
• API endpoint to get the locked status of a project
• Global project lock and unlock
• Update appliance files
• Require name for custom adapters. Fixes #2098
• Allow empty adapter slots for Dynamips templates. Ref #3373
• Use original $PATH in init.sh for Docker containers. Ref #2069