[StockBugFix] New fix request: Germ Source icon on actual germ sources

[Sad-theFaceless]

Hi, it's me again.

As we all know, the Germ Source icons are missing on most germ sources, namely:

• Floral Scent germ sources: Bristle Blossom, Buddy Bud and Bammoth
• Zombie Spores germ sources: Sporechid
• Maybe the Radioactive Contaminants' "germ" sources: Research Reactor and Radbolt Engine

I just thought it would be nice to have a germ overlay actually indicating the germ sources, like it's supposed to.

The issue has been reported a few times, including: https://forums.kleientertainment.com/klei-bug-tracker/oni/missing-germ-source-indicator-on-plants-r42969/ (missing SO and FP elements)

Thank you!

[peterhaneve]

Visualizers have been added to most base game diseases sources in version 4.3.