Export refuses to export LX, with less than helpful message

[mkromberg]

  myns.⎕LX←'lx'
  ]link.export myns.⎕LX c:\tmp\myns

ERRORS ENCOUNTERED: ⎕SE.Link.Export: Not a properly named namespace: #.myns.⎕LX

It should be possible to explicitly export any system variable, even if it does not have namespace scope. Or at least improve the error message.

[abrudz]

Not any, but we can allow workspace (not session!) scope sysvars with a warning and the condition that Import and Create refuse to bring in this folder into any other namespace than #.