***Postgres**: Add delta window function to postgres query builder [#13925](https://github.com/grafana/grafana/issues/13925), thx [svenklemm](https://github.com/svenklemm)
***Elasticsearch**: Fix switching to/from es raw document metric query [#6367](https://github.com/grafana/grafana/issues/6367)
***Elasticsearch**: Fix deprecation warning about terms aggregation order key in Elasticsearch 6.x [#11977](https://github.com/grafana/grafana/issues/11977)
***Table**: Fix CSS alpha background-color applied twice in table cell with link [#13606](https://github.com/grafana/grafana/issues/13606), thx [@grisme](https://github.com/grisme)
***Units**: New clock time format, to format ms or second values as for example `01h:59m`, [#13635](https://github.com/grafana/grafana/issues/13635), thx [@franciscocpg](https://github.com/franciscocpg)
***DingDing**: Can't receive DingDing alert when alert is triggered [#13723](https://github.com/grafana/grafana/issues/13723), thx [@Yukinoshita-Yukino](https://github.com/Yukinoshita-Yukino)
***Internal metrics**: Renamed `grafana_info` to `grafana_build_info` and added branch, goversion and revision [#13876](https://github.com/grafana/grafana/pull/13876)
***Alerting**: Increaste default duration for queries [#13945](https://github.com/grafana/grafana/pull/13945)
***Table**: Fix CSS alpha background-color applied twice in table cell with link [#13606](https://github.com/grafana/grafana/issues/13606), thx [@grisme](https://github.com/grisme)
***Alerting**: More options for the Slack Alert notifier [#13993](https://github.com/grafana/grafana/issues/13993), thx [@andreykaipov](https://github.com/andreykaipov)
***Alerting**: Can't receive DingDing alert when alert is triggered [#13723](https://github.com/grafana/grafana/issues/13723), thx [@Yukinoshita-Yukino](https://github.com/Yukinoshita-Yukino)
***Internal metrics**: Renamed `grafana_info` to `grafana_build_info` and added branch, goversion and revision [#13876](https://github.com/grafana/grafana/pull/13876)