Gns3-gui

* Fix resources dependencies for cloud configuration page (Fixes: 2251)
* Disabled possibility of moving items under zero layer (Fixes 2220)
* dialog-warning.svg fallback for themed icon (Ref. 2245)
* Change width of packet filters dialog (Fixes 2244)
* Fix high CPU usage when using packet filters. Fixes 2240.
* Toggle Node menu item (Fixes 2227)
* Fixes multiselection styles change crash on LineItem (2216)
* Fixes loading symbols for QEMU at Edit Page (2214)
* Fixes exception when right click on Dynamips router in the device dock (2211)
* Update frame_relay_switch_configuration_page.ui

* Info added to the Nat node
* Add missing popup information in cloud and docker node
* Handle invalid json in websockets
* Avoid invalid bad request error when receiving partial answer
* Catch parse error for broken SVG
* Filter QXcbConnection log messages
* Catch class 'PyQt5.QtNetwork.QNetworkReply'> returned a result with an error set
* Fix KeyError: 'overlay_notifications'

* Fix permission error when importing a project on a remote server
* Fix RecursionError
* Fix 'NodesDockWidget' object has no attribute 'loadPath'
* Fix 'MainWindow' object has no attribute '_settings
* Fix object has no attribute 'warning_signal'
* Fix timeout issues when using an appliance
* Make sure ubridge path is not a directory

* Packet filtering
* Suspend a link
* Duplicate a node
* Move config to central server
* Appliance templates on server

* Display error when we can't export files
* Fix auth header not sent is some conditions
* If we have auth issue at server startup continue to get better error
* Do not override IOU configuration file when you change the image
* Fix some PNG loading issues on Windows
* Handle label with missing elements
* Support floating value for font size
* Handle partial json in a response
* Add Dominik as a new team member

* Show a default symbol in case of corrupted file
* When another gui is already running exit instead of proper close to avoid any issue
* Fix duplicate on remote server use wrong location
* Display the location of settings when we disallow opening due to old release
* Improve search for dynamips in development on OSX
* Fix error display when loading a .png custom symbol
* Fix a crash in the progress dialog
* Fix a race condition when exporting a closed project
* Fix RuntimeError: wrapped C/C++ object of type NodeItem has been deleted