GNS3 2.2.1

What's new in this version:

GUI:
- Check if console_type is None
- Explicitly cleanup the cache directory
- Get Windows interface from registry if cannot load win32com module
- Ignore OSError returned by psutil when bringing console to front
- Catch error if NPF or NPCAP service cannot be detected. Ref GNS3/gns3-server
- Better handling for reading synchronous JSON response from server
- Fix JSONDecodeError when getting server version
- Fix FileNotFoundError exceptions when launching SPICE or VNC clients
- Fix UnboundLocalError local variable 'win32serviceutil' referenced before assignment
- 'Fix' tab order in preferences dialog so it follows the layout
- 'Fix' tab order in edit project dialog so it follows the layout
- Use compatible shlex_quote to handle case where Windows needs double quotes around file names, not single quotes
- Use 0.0.0.0 by default for server host. Fixes GNS3/gns3-server
- Catch IndexError when configuring port names

Server:
- Handle builtin entry does not exist when adding node from template
- Upgrade aiohttp to version 3.6.2
- Fix issue when linking to more than one NAT node with allowed_interface option enabled
- Prevent deleting a GNS3 project outside the project directory
- Do not send "console_type" property to computes for all builtin nodes excepting Ethernet switches
- Fix QEMU link detection flaky on last port
- Use compatible shlex_quote to handle case where Windows needs double quotes around file names, not single quotes
- Use 0.0.0.0 by default for server host. Fixes GNS3/gns3-server
- Improvement to validate HTTP authentication config
- Use versioned config directory for profiles
- Enable nested hardware virtualization by default for GNS3 VM running in VirtualBox. Fixes #1377 No error is sent by VBoxManage is this feature is not available, for instance with Intel processors
- Improve process to get guest IP address from GNS3 VM running in VMware workstation/player
- Fix error with console type in Ethernet switch schema