Rethink mobile tables

We should rethink how to display tables on mobile devices. The way we currently use in most places is the responsive table function provided by Materialize [1]. But this implementation is buggy and not very suitable for all tables. Here is an example:

The following options are also possible:

• Make tables horizontally scrollable without making any changes to the table like on Wikipedia [2]
• Add headings for every row again (as in [3])

[1] https://materializecss.com/table.html#responsive

[2] https://en.m.wikipedia.org/wiki/Table_of_keyboard_shortcuts

[3] https://css-tricks.com/responsive-data-tables/

This also may include to remove tables at places where we don't even need tables – like in the above example.