offset doesn't work with IJulia

[MarcMush]

Multiple progressbars with offset doesn't work in a jupyter notebook, both progressbars are printed on top of each other:

p1 = Progress(10; desc="A");
p2 = Progress(10; desc="B", offset=1);
for i in 1:10
    next!(p2)
    sleep(0.1)
    next!(p1)
    sleep(0.1)
end

ijulia.offset.mp4

Originally posted by @MarcMush in #156 (comment)