Fix CSS classes in tables

There are some old bootstrap CSS classes that should be replaced by Materialize classes.

added part::frontend prio::2 type::bug labels

changed title from CSS classes in tables to Fix CSS classes in tables

changed the description

created merge request !275 (merged) to address this issue

mentioned in merge request !275 (merged)

mentioned in commit 3f535108

closed via merge request !275 (merged)