Checkmk Werk 15893: ntop_alerts: introduce pagination to ntop alerts dashboard backend

ID: 15893 Title: ntop_alerts: introduce pagination to ntop alerts dashboard backend Component: cmc Level: 3 Class: Bug fix Version: 2.3.0b1 Previously the alerts dashboard would fetch 5 hours of alert data by default or the time range selected by the user via the time series graphs. This caused performance issues since the number of alerts could vary greatly, often resulting in timeouts. This werk addresses this problem by introducing pagination on the backend. We now only fetch 20 alerts in any given api call. The user can then request more using the next button.