bug 844068, disable l10n for metro, r=mbrubeck,glandium; DONTBUILD

--HG--
extra : rebase_source : 5614ad99cd95a28a57e0539dd1071d35d42bf39e
backout 9f044f9e981a (Bug 842389) due to page correctness regression bug 843997.
Bug 843928 - Share fails because of packaging. r=jimm

--HG--
rename : widget/windows/winrt/components.manifest => widget/windows/winrt/MetroUIUtils.manifest
Merge m-c to inbound.
Bug 838582 - Part 2: Move HTMLTextAreaElement to Web IDL bindings; r=bzbarsky
Bug 842892 - Block scripts while extending the selection for deletion in order to prevent a crash when changing the type of an input; r=smaug