electron v0.26.1

Changelog:

• Fix web-preferences option of BrowserWindow not working.
• Fix showing description of Flash pepper plugin.
• Fix intercepting http/https protocols with porotocol module.
• Fix using persistent storage.
• Fix calling <webview>.goToIndex.
• Fix events not emitted for current monitor in screen module.
• Fix HTML5 fullscreen API in <webview> tag.
• Add plugin-crashed and gpu-crashed events for WebContents.
• Add clearHistory method to WebContents and <webview> tag.
• Add pasteAndMatchStyle method to WebContents and <webview> tag.

Mac

• Don't use textured background for frameless window.

Windows

• Reduces the binary size.

Linux

• Fix click event not emitted for tray icon.