Hello,
is there an easy way to use checkboxes inside table-cells?
The state schould be changeable in edit mode.
Is this extension possibly what you’re looking for?
https://extensions.xwiki.org/xwiki/bin/view/Extension/Add%20Checkbox%20Column%20To%20Livetable
No. 
I’m looking for a something like a todo list but as a table with mutiple checkboxes per row.