shorten button strings
Flesh out "safe moral" and add "max industry" features.

Add dialog controls for both.
"safe moral" is in effect only if expected remaining build time is 1,
"max industry" only if it's not. If we didn't buy till 2 remaining
turns are over, use as few workers as possible then
(except for "safe moral" of course).
improve workers sanity check
distribute any workers which remain after priorities have been processed
don't produce a resource if its store is already full
add manager error reports