Footer message "Displaying x of y found." in actions hint-box doesn't appear when reaching ZBX_WIDGET_ROWS threshold.

Steps to reproduce:

• Acknowledge some event without any action to force actions icon appear in monitoring - problems screen;
• Observe that there are 2 rows in actions hint-box - one for event generation and one for acknowledge;
• Now change the constance ZBX_WIDGET_ROWS to "1" in defines.inc.php;
• refresh problems page and look at same hint-tip again.

Result:
There is only one row (that's correct). Message "Displaying 1 of 2 found" in tooltip footer doesn't appear.

More technical explanation: 
Function getSingleEventActions returns total count of acknowledges and alerts only, ignoring "artificially" added rows like ZBX_EVENT_HISTORY_PROBLEM_EVENT and ZBX_EVENT_HISTORY_RECOVERY_EVENT.