You could always do this if you used the save-state options. You would then paste the path of the folder in the resume from state box. However, the issue is that if you trained for 100 epochs, and the setting was set for 200 epochs, resuming from the trained state of 100 epochs will then train for another 200 epochs, so 300 in total. The epochs in the setting would have to be adjusted if you want max 200.
The new setting is to change the maximum amount of save-state folders you can have. Normally it would save either at the end, which is not great if something bad happens, or at every time you save a copy of the model. This can be a lot of big files, so with this option you can have it set to say a max saved-state amount of 1, so that each new saved-state folder overwrites the older one. Great for saving HD space.