* Created ng-controller for react shared context and set editor.loading
* toolbar-header component with menu button (and story)
* Added editor-navigation-toolbar-root and react2angular plumbing
* Added eslint-disable exception to use <a/> instead of <button/>
* added 'menu' to extracted translation
* [ReactNavToolbar] Added cobranding and back to projects buttons (#3515)
GitOrigin-RevId: 27c3bba85cbc96a123d58c66a0bd5d6a2cfd8aca