add option to show specific canopies in calculate screen

[digitalica]

we could show them at the bottom to use for

• your own current canopy
• the canopy (or canopies) of interest
• the canopies available at a club for students.

if we also save the size(s) and a remark, this will help showing quickly what is happening with these canopies.

Idealy it should be possible to link to the types, but we have no fixed in the database. So options are

• no link, and just save as text, and cat/size
• with link, and add id's in db. (the IDs have been added in the db to support this now)