Add display_as_absolute flag to DV_QUANTITY

Description

There are a number of common quantitative types
which are commonly displayed and recorded as positive numbers
but which are really negative numbers - as far as is known, they
are all differences over time, such as: weight loss, postural drop
(since last examination) and so on. A way is needed of marking
these quantities to be displayed as positive, because they will
almost always be in reponse to a question which implies the
negative, e.g. "weight lost since last visit: ". However, it is
imperative that these quantities are represented and computed
normally.

Assignee

JeffJ

Reporter

(Sam Heard) inactive

Raised By

None

Priority

Minor
Configure