Bug 922144 - Part 1: Aligned values option for Variables View. r=vporof

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extra : rebase_source : 20a8e6ed186b85189b2cbe95b52c8b007e7ea09b
Bug 922144 - Part 2: Actions first option for Variables View. r=vporof

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extra : rebase_source : 07b4de41e6e9f5f9636ec742b1511950cdca67af
Bug 922144 - Part 3: Manifest editor layout and colors. r=paul

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extra : rebase_source : a7b2d42167d1c22de7245957dc458409cf5bade5