dart editor repeats property name rather than showing type of property

[DartBot]

This issue was originally filed by mattsh@google.com

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When using code completion in dart editor, for properties it shows the property name twice, rather than showing the property name and the type.

I.e., the code completion list shows this:

title title
text text

rather than:

title String
text String

[stevemessick]

Set owner to @stevemessick.

[stevemessick]

Added Fixed label.