Add modifier to APL

[anthraxau]

Seen on trello backlog here https://trello.com/c/HGyCTgKd

Instead of adding a plus and minus right on the dashboard like for wounds as i believe wounds requires that as its changed often.

Could have a modal popout for APL where you can set negative modifiers. This is something i come across alot in games aswell as APL modifiers.

Modal example, could have a small modal box with simple -1 mod +1 mod. could also have a selection for "only one TP" or "entire match"

an example of this and this is just one ive noticed many APL modify abilities.

when getting hit with the Fellgor Ravagers 'Pox Bomb'

Select one point in the killzone within pentagon of this operative. Roll 1D6 for each other operative within radio_button_unchecked of that point:

    On a 3+ subtract 1 from that operative's APL
    On a 5+, that operative also suffers 3 Mortal Wounds

This operative cannot perform this action while within Engagement Range of an enemy operative.

It would be handy to be able to mark when an APL