On 1.18-rc1 job invocation details does not show the graph
Steps to reproduce:
1) Install 1.18-rc1 with REX
2) Run a REX job
2) Take a look at the job invocation detail page
There should be a graph showing on how many hosts the job succeeded/failed and so on.
There is no graph, "TypeError: e[t] is undefined" logged in the browser console