Fixed apple-mobile-web-app-status-bar-style

According to Safari's HTML Reference, the meta tag `apple-mobile-web-app-status-bar-style` can have one of the following values:

`default`, the status bar appears normal.
`black`, the status bar has a black background.
`black-translucent`, the status bar is black and translucent. 

>If set to default or black, the web content is displayed below the status bar. If set to black-translucent, the web content is displayed on the entire screen, partially obscured by the status bar. The default value is default.

Source: https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html