bug#43569: 28.0.50; Menu "Continue Tags Search" signals an error

[Drew Adams]

> That's not what I've done.

OK, I've looked at your patch; thx.  And I've updated
my code.  For Emacs < 27, I've found that there's no
good condition for :enable.  I was mistaken thinking
that (tags-loop-eval tags-loop-scan) could be used.
___

FWIW:

I call the menu item for [tags-repl-continue]
"Continue Search/Replace", with :help "Continue last
tags search or replace operation".

It's incorrect to say that it continues the last tags
replace operation.  It continues the last tags search
or replace operation.  If the last tags operation was 
`tags-search' and not `tags-query-replace', then it
continues the last search, not the last replace.