Improve sorting and display of CJA bucketed dimensions

[#1]

Description

1. Sorting for bucketed dimensions in CJA should default to logical sorting by the dimension's numerical value, rather than it's label.
2. Buckets should be displayed more clearly (Less than 30, 30 to 59, 60 to 119, 120 or more)

Why is this feature important to you

1. Bucketed dimensions are intuitively understood when sorted in logical order by the value of the dimension. For example, shortest to longest time.
2. It's confusing when two buckets are ambiguously defined and contain the same value (example: 30 to 60, 60 to 120).

How would you like the feature to work

1. Bucketed dimensions should default to logical sorting by the dimensions numerical value. At a minimum, users should have the option to sort by logical order. 
   Example: If I have a bucketed dimension for time in seconds (Less than 30, 30-60, 60-120, 120 or more), I'd like the option to sort them logically as either:
        Less than 30, 30 to 60, 60 to 120, 120 or more, or
        120 or more, 60 to 120, 30 to 60, Less than 30
2. Bucket ranges should be clearly displayed (without any overlap)

Current Behavior

1. Sorting by the bucketed dimension sorts by non-intuitive, alpha-numeric orders either:
   

        Less than 30, 60 to 120, 30 to 60, 120 or more, or

        120 or more, 30 to 60, 60 to 120, Less than 30

2. Bucket ranges overlap (30 to 60, 60 to 120, 120 or more), causing confusion.