Drop-down lists from Administration -> Logging have a larger width after setting a value

Go to Administration -> Logging and set some values. The entries for which you set a value have the drop-down list width larger than the other ones.

This is happening because after fixing XWIKI-10505 the width of the list is dynamic. The list becomes larger because of the "<default>" entry which appears in the list after changing the value.

Reproduces on both Colibri & Flamingo.