Job nodes are missing in the workflow graph for pipelines with sequential stages

[sagar1312]

What happened:

#3117 added more horizontal spacing between the stages. This created a regression as the additional spacing introduced is not accounted to adjust the overall width of the graph. Due to this, few jobs at the end of the workflow are not visible

What you expected to happen:
When horizontal spacing is added between the stages, the overall width of the graph needs to expanded accordingly.

How to reproduce it:
Create a pipeline with the below workflow

• 2 or more sequential stages (i.e. a stage triggering another stage)
• one or more non-stage jobs which get triggered after the last stage

Sample pipeline https://cd.screwdriver.cd/pipelines/15612/events/827262