Fix Lfm::translateFromUtf8() to handle an array of strings and not only a string.

[patacra]

To solve a crash (error 500) on Windows env, when doing a move operation.

Issue number: #739

Summary of the change: Make translateFromUtf8() handle arrays of strings and not only a string.

Notice that it is a similar proposition of the pull requests:

• Fix error TypeError: mb_detect_encoding(): Argument #1 ($string) must be of type string, array given in file Lfm.php with change method translateFromUtf8 #1234, which didn't update the function header and also could potentially lose the array keys as it is not modifying the original array but creating a new one without re-using the original keys.

• Fix Error - Windows - mb_detect_encoding - #739 #1014, which also doesn't correct the function header and creates a new array for nothing, also losing the original array keys.

[streamtw]

Thanks @patacra for this pull request and detailed elaboration!