Add fullscreen toggle

vdiclient.ini.example

@@ -9,9 +9,12 @@ icon = vdiicon.ico
 logo = vdiclient.png
 # Enable Kiosk mode, which does not allow the user to close anything
 kiosk = False
+# Enable/Disable Fullscreen mode (not applicable in Kiosk mode)
+fullscreen = True
 # Enable displaying SPICE ini file before opening virt-viewer
 inidebug = False
 
+
 [Authentication]
 # This is the authentication backend that will be used to authenticate
 auth_backend = pve