[0.15.12] Negative Force bonuses display poorly

[Mylon]

Screenshot example:

https://steamuserimages-a.akamaihd.net/ ... DC1BA6490/

If I set the force bonuses to a negative value, they display poorly and inconsistently. In the screenshot, worker_robots_speed is displayed as "--39%" (instead of merely -39%) and research speed is displayed as +-49% (instead of merely -49%).

[Rseding91]

Thanks for noticing. They're now fixed for the next version of 0.15.