Bug 893358 - Italian keyboard layout support
(cherry picked from commit f060cde6d358580bb6d1b7661c03ca8a0f94ed7b)

Conflicts:

	apps/settings/index.html
	apps/settings/locales/settings.en-US.properties
Merge pull request #12521 from davidflanagan/ltedone-italian-v1-train

Ltedone italian v1 train
Bug 914454 - Add a new keyboard layout, "Greek SMS" to allow sending
messages with GSM 7-bit encoding.
To address David's review comments