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I forgot to mention, the following modification to <table
class="body"> is needed to make my solution work:

<table class="body" tal:define="columns
string:id,activity,title,creator,status;
columns_showall
string:title,creation,reporter_s,status,topic,deadline;
status_notresolved string:-1,1,2,3,4,5,6,7">

This allows to customise the fields of interest etc. in a
central place and reuse it for the several links.