Fix list.js scrolling regression patch

The list.js patch for the scrolling regression (issue 0030494, commit
7c0e2b8590c1e2c6ab17a566e14839584009a064) introduced another regression,
because preventing the default click event's execution not only applied
to the pagination buttons, but also to the checkboxes and the Apply
button as well, basically making the whole Manage Accounts section
unusable.

To fix the problem, we now only execute preventDefault() when the
pagination buttons are clicked.

Fixes 0030494