Bug 866623 - Firefox spoils cyrillic text in the Network Monitor response tab - fix convertToUnicode misbehaving when a request has no attached contentCharset, r=rcampbell

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rename : browser/devtools/netmonitor/test/browser_net_cyrillic.js => browser/devtools/netmonitor/test/browser_net_cyrillic-01.js
Bug 873749 - SideMenuWidget shouldn't automatically scroll to bottom when there's a selected item, r=rcampbell
Bug 873751 - Closing the requests details pane should deselect the currently selected item, r=rcampbell