Merge pull request #13248 from timdream/italian

Bug 893358 - Add Italian keyboard layout support r=djf(cherry picked from commit 4d468a5d00a02914fb440d50110a4e5e052adc8e)
Merge pull request #13262 from davidflanagan/bug893358-v1.2

Merge pull request #13248 from timdream/italian