Fix the "Data is more than one month old." message

[tanius]

Currently, Graphryder Dashboard will always show the following message when opening the right sidebar via the top-right gear icon:

Data is more than one month old.

This even happens when the database has just been filled for the first time. This message is also contradicted by the version timestamp right below that message, in the same sidebar, which in the case right now indicates that the data is a day old:

VERSION
Mon Oct 21 2019 16:25:51 GMT+0200 (Central European Summer Time) (based on latest timestamp)

Also, that version timestamp is shown in green in this case, while it is shown in orange for data that has indeed "matured". So there simply seems to be some inconsistency in the code 🪲 …