Add SparkWidget.setAttr()
Explicit deliverChanges() for button enabled/disabled (didn't help, but still)
Hack broken states of spark-dialog-button in dart2js version
Hack broken enabled/disabled for main toolbar's spark-buttons in dart2js version
Hack to fix the 'active' state of menu button in dart2js version
Missed ?= for one attribute on a sub-element
Indentation
Merge pull request #2247 from ussuri/fix-buttons-state-in-deployed

Fix buttons' states/styles in dart2js version of the app