Feature/move server frontend mapping to the frontend (#591)

* Convert "WebInterfaceManager" to singleton

* Move server webUI mapping to the webUI

* Extract logic into functions

* Retry failed download

* Validate downloaded webUI

* Automatically check for webUI updates

* Add logic to support different webUIs

* Update logs

* Close ZipFile after extracting it

server/src/test/resources/server-reference.conf

@@ -28,6 +28,8 @@ server.webUIEnabled = true
 server.initialOpenInBrowserEnabled = true
 server.webUIInterface = "browser" # "browser" or "electron"
 server.electronPath = ""
+server.webUIChannel = "stable"
+server.webUIUpdateCheckInterval = 24
 
 # backup
 server.backupPath = ""