Add "Full Screen" button to main toolbar

[system]

Hello, I’m Ron, an automated tech support bot

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:

• MIME types
• Customize toolbar in viewer - Examples - Add a custom save button
• Core engine for WebViewer - Interacting with Core

APIs:

• Core.Tools.MarqueeZoomTool - addEventListener(type, fn [, options])
• Adding a download button
• Core.Tools.FreeHandCreateTool - mouseRightDown(e)

Forums:

• Add custom button to the Menu
• Disable UI buttons in
• PDF.js Express Viewer not working via reverse proxies