Add a comparison category for compare()

src/kaevent.cpp

@@ -3638,8 +3638,12 @@ bool KAEventPrivate::compare(const KAEventPrivate& other, KAEvent::Comparison co
         }
     }
     if (comparison & KAEvent::Compare::ICalendar) {
-        if (mCreatedDateTime  != other.mCreatedDateTime
-        ||  mCustomProperties != other.mCustomProperties) {
+        if (mCustomProperties != other.mCustomProperties) {
+            return false;
+        }
+    }
+    if (comparison & KAEvent::Compare::Created) {
+        if (mCreatedDateTime != other.mCreatedDateTime) {
             return false;
         }
     }

src/kaevent.h

@@ -1289,9 +1289,10 @@ public:
     /** Data categories for compare(). */
     enum class Compare {
         Id           = 0x01,   //!< the event ID
-        ICalendar    = 0x02,   //!< iCalendar data stored in VEVENT in the calendar file
-        UserSettable = 0x04,   //!< user settable data, e.g. resource ID
-        CurrentState = 0x08    //!< changeable data which records the current state of the event
+        ICalendar    = 0x02,   //!< extra custom properties for the event in the iCalendar file
+        Created      = 0x04,   //!< the event creation timestamp
+        UserSettable = 0x08,   //!< user settable data: resource ID, item ID
+        CurrentState = 0x10    //!< changeable data which records the current state of the event
     };
     Q_DECLARE_FLAGS(Comparison, Compare)