Imported LESS files don't know about variables

[moringm]

Our variables are defined in the main less file, and some are referenced in other less files that are called in as @imports in this main less file. However, upon editing these nested less files, Easy LESS' task throws an error on the first nested less files' var reference.

It only occurs on the nested less files that have been edited: it compiles the earlier-imported less files without problem if they've not been edited.

[moringm]

This is a duplicate of the issue jjnxpct noted in Aug.