y-axis in Merge Request Analytics table displays 500m label
When there's only a low number of MRs merged for a given time frame, the y axis shows a strange 500m label. This should rather be displayed as 0.5 or omitted.
This also appears next to the Avg below the chart.
/cc @blabuschagne @mlunoe and thank you @m_frankiewicz for reporting
Edited  by Martin Wortschack
