fix bug 1080289 -  replaced 'Account Settings' for 'My Account'

Basically all the locales where I found it
and these files
	modified:   src/media/css/header.styl
	modified:   src/media/js/views/settings.js
	modified:   src/templates/_macros/act_tray.html
	modified:   src/templates/settings/main.html
	modified:   tests/ui/account_settings.js
got changed.