Plunge Freezing: Add new fields

[MicheleCD]

Add a new section called Blotting In that section add the following fields:

• Blot Type

This should be a drop down field including the following options: Single sided - back Single sided - front Double sided

• Blot Force

This should be an integer field that allows both positive and negative values

• Blot Duration (in seconds)

This should be a real number field that only allows positive values.

[Demeter9]

@nickcrawford1 Not sure if adding a new sections is fine or need to do more work on backend for this to work. I am pushing this in any case, so you can decide if you merge or not