Bug 1000859 - Add Xhosa xh locale
Bug 1001972 - [l10n][en-US] Typography consistency for 2.0
Bug 973454 - [settings] refactor App permissions panel with AMD pattern
Merge pull request #18623 from cctuan/973454-3

Bug 973454 - [settings] refactor App permissions panel with AMD pattern
Merge pull request #18677 from arky/General_L10N

Bug 1000859 - Add Xhosa xh locale
Merge pull request #18716 from TheoChevalier/typography-fix

Bug 1001972 - [l10n][en-US] Typography consistency for 2.0
Bug 973445 - [settings] refactor Sound panel with AMD pattern

- add tone tests