v2.6 - nil error fixes and cleanup

Spread the word: 59% support of waiving all patent protections to produce generic versions of life-saving medicines for critical diseases

• Remove vestiges of FG sidebar images
• Fix nil error when malady effect is blank (such as with poisons).

See previous release:
https://github.com/bmos/FG-PFRPG-Malady-Tracker/releases/tag/v2.5