editor libraries missing

[DartBot]

This issue was originally filed by @darrellpf

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What steps will reproduce the problem?

1. Download editor build 4904 (linux 64 bit version)
2. Click to run sunflower sample project
   3.

What is the expected output? What do you see instead?

Project and libraries fail to show up in the files/libraries viewer portion. Also the first line of the sunflower.dart gives shows:

Multiple markers at this line
    - Native classes must not extend other classes
    - Unexpected token 'IDENTIFIER' (expected ';')
    - Unexpected token 'EOS'
    - no such type ""
    - duplicate top-level definition
     'UnsupportedOperationException'
    - Unexpected token 'IDENTIFIER' (expected ',')
    - Unexpected token ',' (expected '{')
    - Unexpected token '(' (expected 'IDENTIFIER')
    - Unexpected token 'IDENTIFIER'
    - Unexpected token 'IDENTIFIER' (expected ']')
    - Unexpected token ',' (expected ';')
    - Unexpected token 'IDENTIFIER' (expected '(')
    - Unexpected token 'STRING' (expected 'IDENTIFIER')
    - Unexpected token '}'
    - Unexpected token 'throw'
    - Unexpected token 'new'
    - Unexpected token '{' (expected ';')

Please provide any additional information below.

[danrubel]

The continuous build of editor is in a transitionary state between old UI and a new UI that we are introducing. We should have this resolved Tuesday.

[DartBot]

This comment was originally written by @darrellpf

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No longer a problem in build 5065

[madsager]

Added Area-Editor, Fixed labels.