Fix long-standing (kde3) bug where MMB on a link to a non-html-file (e.g. PDF) would first create a new tab, and then ask "save or open in kpdf", leaving the tab empty and useless.

A cookie to who can find this report in bugzilla, surely it's there somewhere.

Also fixed the effects of the "ask whether to save first" checkbox from the filetypes-config-module, it wasn't used since I moved that setting to filetypesrc (to make it konq-independent).