Minor: in board overview/thread there is no space between date and page amount

[Flitzpiepe42]

browser: firefox klar, ios (cellphone)

there is probably just padding or a space char missing between the last digit of "date last answer" and the first digit of "amount pages".

[spuxx1701]

fixed in https://github.com/spuxx1701/potber/commit/e98e6365314b879af943e3a34ebe3aa1cad10d06