AskUserActionInterface: fix JobUiDelegateExtension include

Ahmad Samirrequested to merge
work/ahmad/fix-include into master

Using '#include <jobuidelegateextension.h>' breaks the build of other software that's building against KIO, e.g. KParts. Instead use: '#include <kio/jobuidelegateextension.h>'

Edited by Ahmad Samir

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