Make the "depot" default for transit models

[rikardn]

I think this is the most natural first step if going to transits.

[rikardn]

At least when you have FO absorption.

[antoniaih]

Depot is set as default now for all types of absorption. Or should it only be default for FO absorption?

[rikardn]

I think we have another issue mentioning some combinations that we don't allow. For example ZO+transits and SEQ+transits.

[antoniaih]

Yes, SEQ+transits without depot gives an error. ZO+transits works.

[antoniaih]

I blocked ZO with 1 transit and SEQ-ZO-FO with transit without depot. But maybe this issue needs to be dicussed later.

[rikardn]

Ok. Yes I think we'll need to go through all cases for absorption rate and delay and what makes sense to not allow.