[v1.0 release] No checkbox/line break rendering in description view

[Pilzinsel64]

As the titel says, the checkboxes doesn't render anymore, as well as line breaks are ignore. It looks now a bit weird. And maybe because this, the number of checked/unchecked checkboxes isn't visible on the card anymore.

View:

Edit:

[putt1ck]

This might be related to a change in the library used for markdown (discussed #1731); if you add a "- " before each item it should work again. Maybe there's something that could be done to take care of that automagically if you have a lot of cards with checkboxes.

[Pilzinsel64]

Oh, yes. Missed that. Why I didn't try that 😔 Does work now! Thanks.
And what's about insert empty lines? I mean, it looks weird if the distance of the header to the text above is smaller then the distance between the header and the text after that header.

[juliusknorr]

Let's track that in #1808