Code review comment for lp://staging/~caioromao/apport/kde_question_userpass

Hi Martin,

This time I've implemented the ui_question_userpass method on apport_kde. I wrote a basic one for my tests and decided to make it work correctly, that's why I haven't implemented it in apport_gtk nor in apport_cli.

The first commit in this branch simply fixes some identation issues: mixed use of whitespace and tabs.