Improvement

• Update core framework.
• Implement invalid protocol handling.
• Add error page on failing to load a website.
• Show warning favicon in error pages.

Fixed bug

• Fix issue that input cursor is invisible after navigation in webview on some websites.
• Fix issue that password setting display is broken.
• Fix issue that webpages do not stop loading sometimes.
• Fix issue that there was incorrect navigation on Windows by using 'Open in New Tab' option.