issues/2176-settings-about-size

set webView width via meta tag in webViewDidFinishLoad for instances when we are showing a webView in a popover, fixes #2176
Minor comment about code style. For the sake of readability, it might be nice to split up long strings like this and use a separate line for each js statement. 
Very minor and no need to make a change. We'll merge this PR as is. :)