5 unique satchels when selecting "satchel"

Enabled for RD, Xenobiologist , Scientist, Botanist, Virologist,
Geneticist, Chemist

http://puu.sh/8BqEX.png http://puu.sh/8BriB.png
Else Ifs
Merge pull request #4921 from Jarcolr/UnusedIcons

Adds 5 satchels for jobs when selecting "satchel" for backpack pref from code