Title per view

[anuveyatsu]

When generating specs for Plotly graphs, we need to have some default name for cases when there is no title property in a view. At the moment, we are using title property if exists and making it empty string if it does not.

const plotlySpec = {
    data
    , layout: {
      title: view.title ? view.title : ''
      , height: 450
      , xaxis: {
        title: view.spec.group
      }
    }
  }

Use in the following priority:

1. view.title
2. view.name
3. A view for ${view.resources.join(', ')}

Acceptance criteria

• plotly graphs always have titles

Tasks

• refactor simpleToPlotly function in /lib/view.js

[rufuspollock]

@anuveyatsu if using view.name i'd convert back into human style (e.g. - to space capitalise etc)