Optimist trait doesn't adjust the food joy in the Eating list

[l29ah]

To Reproduce
Steps to reproduce the behavior:

1. Get some meat jerky.
2. Press E.
3. See it being worth +4 of joy.
4. Eat it.
5. Press v.
6. Observe meat jerky giving you +5 of joy.

Versions and configuration(please complete the following information):
0.C-34167-ge91cc0338e-dirty

[ianestrachan]

This also occurs in reverse with the Bad Temper trait, and the unmodified numbers are also visible on the item description screen(s).

[Night-Pryanik]

After overhaul of morale menu, it's hard to tell exact values of joy gained. As such, now eating meat jerky with Optimist trait gives a total positive value of +10 with Optimist giving 86% and eating meat jerky giving 13% (such rounding sucks BTW).