Plugin suites not installed are not greyed out in main menu

[firthm01]

From the main menu options (Create project from BW64 ADM file... and Import from BW64 ADM file...), the plugin suites which are not installed should be greyed out, but they're not. From the item right-click ADM menu, they are correctly greyed out however.

Clicking on an unavailable plugin suite will still begin the import process, but fail (fairly gracefully, but with a fairly generic error message.) If the greying out isn't possible for whatever reason, a reasonable compromise would just be to do the check in the plugin registry immediately when the option is clicked.