Version 2.2.0a2

• Web-UI v2019.1.0-alpha.1
• Update docs for update-bundled-web-ui.sh
• Fix issue when loading and quickly closing a project and opening it again. Fixes #1501.
• Disable unreliable nested virtualization check.
• Fix issue not checking build number on Windows.
• Change Hyper-V requirement checks.
• Early support for symbol themes.
• Re-order handlers in order to prevent CORS
• Download custom appliance symbols from GitHub Fix symbol cache issue. Ref GNS3/gns3-gui#2671
• Option to export snapshots.
• Support tags versioned WebUI when bundling
• Support selecting a compression type when exporting a project.
• Change how VPCS executable is searched.
• Use aiofiles where relevant.
• Update paths for binaries moved to the MacOS directory in GNS3.app
• Locked state should not be used when duplicating a node.
• Handle locking/unlocking items independently from the layer position.
• Use aiozipstream for snapshots. Fix tests.
• Project duplication support.