In taxa bloc, display information that there is no data, when this is the case

[damiendevienne]

For now, in the taxa bloc (right), information like age, IUCN status, databases is simply absent when there is no data. It could be useful to explicitely write that there is no data.

For example:

Age: no estimate
IUCN: no status
iNaturalist: no entry
Open tree of Life: no entry
etc.