[PATCH] Structure tree - show population bonus

[elexis]

Not only houses, but many buildings give additional room for population. Users should be able to reevaluate the worth of the buildings. Therefore the structure tree / tooltips should show these values as well. They can be found in the template files by searching for PopulationBonus, for example:

• celtic storehouse +2,
• temple +5
• dock +5
• fortress +10
• CC +20
• rotary mill +2

[s0600204]

Patch to add population bonuses to structree tooltips

[elexis]

In 17643:

Show the population bonus of buildings in the structure tree. Patch by s0600204, fixes #3738.
Also fix a newline in the tooltip.