Messages about insufficient resources/population

[Langbart]

When you lack enough ressources you get Insufficient resources:. Added with [12404]. When pop capped and producing a new unit, the mesage Insufficient population capacity: shows up. Added with [13198].

Issues

• Both should use the same font
• Seems more consitant if the Insufficient population message also gets its own tooltip
• The queued icon should blink like the top bar does. The issue was discussed in #1659, but dropped:

Quote from zoot:

I've dropped the 'blinking' feature which wasn't ready for prime-time. I'll add that in separate ticket if I get it to work.

[Langbart]

fix image macros