Gns3-gui

* Fix project does not load anymore. Fixes 3140
* Do not connect to server while waiting for user to accept/reject SSL certificate. Fixes 3144
* Fix invalid server version check request. Fixes 3144
* Upgrade dependencies
* Add terminator as a predefined custom console option

* No changes

* SSL support.
* Remove the useless file "zoom-in (copy).svg". Fixes 3114
* Use HDD disk image as startup QEMU config disk
* Edit only text mode config files
* Hide config import/export when configFiles attribute is empty
* Qemu disk interfaces must be set to "none" by default. Ref 3035
* Do not allow image to be configured on Qemu VM secondary slave disk if create config disk option is enabled.
* Add explicit option to automatically create or not the config disk. Off by default.
* QEMU config disk support

* Remove "-nographic" option by default for Qemu VM. Fixes 3094
* Fix app cannot start on macOS Big Sur. Ref 3037
* Require confirmation before stopping all devices.

* Fix packets capture stops after some time. Fixes 3067
* Option to allocate or not the vCPUs and RAM settings for the GNS3 VM. Fixes https://github.com/GNS3/gns3-gui/issues/3069

* Fix custom symbol not sent to remote controller when installing appliance