Update alerting.md

fix: Data source group by time interval did not take effect on initial query after dashboard load, fixes #7839

Add missing `"`

Closes #5278 and closes #3090

Closes #7770

Make Prometheus query field a textarea #7663

This is an old PR so had some problems after merging in master.

- Fix for min and max that were not getting passed into the
applyLogScale function
- Fix for when min/max were undefined rather than null
- Fix for decimal ticks, as this PR populates the ticks itself then
it also needs to calculate the number of decimal places too. Flot
was showing the wrong number of decimal places sometimes otherwise
on the y-axis.

Small fix for the "glow" when focus the field for LIMIT and SLIMIT

when checking if rendering a png for lazy loading of panels.

Included LIMIT, SLIMIT and ORDER BY time for influxdb. closes #6065 and closes #7232

* (prometheus) adjust annotation step

* (prometheus) add step option