don't ignore buried cards in future due graph

[jakeprobst]

the future due graph undercounts cards by a notable amount when using "Bury Review Siblings".

before

after

but more importantly it makes the load balancer look better 🍃

Closes #1984

[dae]

Thanks Jake!

[dae]

Re-reading the issue I linked, should we perhaps be checking for due <= 0 instead?

[jakeprobst]

changing it to due <= 0 does not seem to make a difference in how the chart ends up. Though the number for today in the graph is not entirely accurate as it still misses some cards. For example for today the graph says I have 197 due but I actually have 208 due. Checking Backlog does show additional cards that would explain the difference.

To fix the thing you are thinking of I think, this would need to see if Backlog is checked and then count negative days as zero.