Mortimer ignores test sessions

[ctreffe]

Mortimer does not show test versions of experiments in the experiment details and the data export page. While I do not mind the test versions not showing in the experiment details, I would like to be able to export test data sets from Mortimer. Currently, I can only export test datasets by selecting "all" in the version selector of the export page.

Also, when we rework the version section of the experiment overview into a tabular display, we should enable the display of test versions, I think.

[jobrachem]

Hmm, sounds like mortimer in some way relies on the previous version format. We will have to look into that, should be a straight-forward fix.