Provide better integration for Project browser

.tugboat/config.yml

dist/css/base/gin.css

dist/css/components/maintenance_page.css

dist/css/components/project_browser.css

dist/css/theme/dialog.css

dist/css/theme/variables.css

gin.info.yml

gin.libraries.yml

styles/base/_body.scss

styles/base/_button.scss

styles/base/_regions.scss

styles/components/maintenance_page.scss

styles/components/project_browser.scss

styles/theme/variables.scss

webpack.config.js