[Bug 21174] Ensure "Sample Stacks" stack does show up in menu "Windows"

[livecodepanos]

No description provided.

[livecodeali]

In order to prevent the need for modifying this in two places in the future, I suggest refactoring slightly to have a function

function revIDEStackIsIDEWindow pStackName
   if pStackName begins with revIDEScriptEditorPrefix() or pStackName is "revDictionary" \
      or pStackName is "revResourceCenter" or pStackName is "revOnline" then
      return true
   end if

   return false
end revIDEStackIsIDEWindow

which can then be called from both revIDEStackIsWindow and setupWindowMenu

[livecodeali]

@livecode-vulcan review ok 75f7b92

[livecode-vulcan]

💙 review by @livecodeali ok 75f7b92