Multi-taxa plots do not pick up missing data message

[jfy133]

Multi-taxa plots do not pick up missing data message

e.g. for ElSirdon in new test data: Ceratotherium

[jfy133]

Issue is more generalised - when there is no entries for a given file/node selection, an empty object is returned. The nrow thing fails (e.g. line 516 server) here, because the issue occurs at create divs.

If the div creation inherits an empty list, it cannot build divs and then fails completely.

[jfy133]

Currently disabled for the time being