[SUGGESTION] Add glass panes/iron bars as an option to everything too

Description

Adds checkboxes for glass panes/iron bars

[Deviouslrd]

Turns out that iron bars have a different json structure and different files required so this would end up having to be 2 seperate options. Might find a way to put them under 1 radio button though, probably with a sort of dropdown with radio buttons as the children. This means I'll try add them both.