* Fix desktop-id notification edge case
* Extract-method platform_util::GetDesktopName()
This removes duplicated code from libnotify_notifications.cc
and atom/common/linux/application_info.cc.
* Check for empty case in GetDesktopName().
* Move GetDesktopName() to brightray::util
* Remove unnecessary changes in platform_util
* Add a brightray::platform_util namespace
* add brightray API to override app version
* in atom browser, use brightray app version API
* on Linux, have GetApplicationVersion() use brightray version API
* on Linux, implement brightray::GetApplicationName()
* fix typo in brightray API
* make browser.GetName() logic follow GetVersion() logic
* improve variable name in OverrideApplicationVersion declaration
* fix typo in brightray impl