Non-informative message if packages are missing

[GegznaV]

Non-informative message/output if both 'hunspell' and 'LanguageToolR' are missing.

> wellspell.addin:::gramcheck()

Listening on http://127.0.0.1:7446
Warning: Error in if: argument is of length zero
  81: observeEventHandler [D:/r/wellspell.addin/R/wellspell_config.R#245]
  10: shiny::runApp
   9: shiny::runGadget
   8: set_config [D:/r/wellspell.addin/R/wellspell_config.R#265]
   7: check [D:/r/wellspell.addin/R/wellspell.R#100]
   1: wellspell.addin:::gramcheck [D:/r/wellspell.addin/R/wellspell.R#7]

[nevrome]

Please check if 2d9db4a fixes this, @GegznaV

[GegznaV]

Option 1: Packages are missing

If 'hunspell' or 'LanguageToolR' are missing, then wellspell.addin:::gramcheck() and wellspell.addin:::gramcheck() give informative messages, but wellspell.addin:::set_config() still opens the configuration dialogue and if "Done" button is pressed, the output is uninformative:

Listening on http://127.0.0.1:5002
Warning: Error in if: argument is of length zero
  76: observeEventHandler
   5: shiny::runApp
   4: shiny::runGadget
   1: wellspell.addin:::set_config

Option 2: 'LanguageToolR' is installed but the 'LanguageTool' is missing

If 'LanguageToolR' is installed but not configured, wellspell.addin:::gramcheck() open the configuration dialogue, and if "Done" is pressed, the output message is similar as in option 1:

> wellspell.addin:::gramcheck()

Listening on http://127.0.0.1:7691
Warning: Error in if: argument is of length zero
  83: observeEventHandler
  12: shiny::runApp
  11: shiny::runGadget
   8: set_config
   7: check
   1: wellspell.addin:::gramcheck

I think, in this situation, it should be suggested to run LanguageToolR::lato_quick_setup().