Health tab for ships

[jonepatr]

Is your feature request related to a problem? Please describe.
Currently the notes are used for tracking critical hits and armor which is not ideal.

Describe the solution you'd like
Probably an additional tab where one can track a ships health information. Perhaps this tab could be related to the health of the ship and hull points would be moved here too (but let the "current hull points"-field be editable from the first tab, but have the max static) and armor value (reffered to in #428)

Describe alternatives you've considered
Keep using the notes

Additional context
Not sure if the various game rules differ regarding critical hits, so this might need to be configurable.