Content Creator: Indicate that tabular data is sortable

[ineedsubstance]

As a Content Creator, I want to see a visual indication of all data that is sortable so that I can quickly understand what is possible when trying to find and sort content.

Feature: Sortable tabular data
  As a Content Creator,
  I want to see a visual indication of all data that is sortable
  So that I can quickly understand what is possible when trying to find and sort content.

  Scenario: Indicate that tabular data is sortable
    Given I will need to find specific content
      And that I want to sort data to get my desired results
     When I view a list of content
     Then I will see a visual indication that the tabular data is sortable

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Sortable tabular data:

• [ ] Indicate that tabular data is sortable

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http://watson-cms.stage1.mybluemix.net/content/api

Relates to #270

[ineedsubstance]

@joshkimmell @mkiang3051 @scottnath @poofichu - story ready to be reviewed. 🎱

[joshkimmell]

🎱 🎱

[mkiang3051]

🍥 🍥

[ineedsubstance]

Blocked by #270