* 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 https://github.com/GNS3/gns3-gui/issues/2671 Fix temporary directory for symbols was not deleted Fix temporary appliance file was not deleted
* 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.