Use "tag" terminology consistently in the UI
KOrganizer's user interface uses both "tag" and "category" as terms for the same concept. KMail uses "tag". KAddressbook uses "tag", and uses "category" to mean "tag or group". Switch KOrganizer to "tag", for consistency among Akonadi applications.
See also incidenceeditor!14 (merged) eventviews!21 (merged) calendarsupport!8 (merged)
GUI: