Fix issues for displaying and configuring#8

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iwill wants to merge 6 commits intoHugoHasenbein:masterfrom

Commits on Feb 8, 2022

Fix: Chrome does not display left and right boders for due date - https://stackoverflow.com/questions/18679020/border-around-tr-element-doesnt-show
iwill
committed
Fix: display darker background colors for `tr`-s with `nth-child(even)` - the background colors are generally light, and lightening a light color may get white, which looks like a bug
iwill
committed
Fix: default border does not display by 76dbdde
iwill
committed

Commits on Feb 9, 2022

Fix: remove unwanted whitespace
iwill
committed

Commits on Feb 10, 2022