joined stats dashboard is not generated after latest changes

[scabaa]

Hey, I just tried your latest changes with adding calendar heatmap with daily distance in commit 7c8246a and it seems none of the dashboard elements (png files) generated after duration_between_rides.png which is the last one before you started making changes around line 445 in plot_stats.py. Hence one_stat.py also not joining any.

Weird thing that I haven't got any error through the run.. just realised that I am missing many dashboard elements including the joint one.

[scabaa]

Actually it might be some different commit causing this. Just reverted this one and still getting the same result.