Bug 985037 - Update a11y visiblity management in light of lockscreen changes.

We should not be setting aria-hidden on #windows anymore, instead it should be on individual apps.
Bug 985037 - Part 2, fix lockScreenWindow visibility state
Bug 996522 - [NFC] reset currentURL to null in Homescreen. r=alive
Bug 1001212 - Cannot preinstall a packaged app that has a mini-manifest using a package_path that is a relative path
Bug 1003089 - Skip test_receive_call.py if the Plivo credentials are not present
Bug 983684 - Detect device/b2g type and set gaiatest timeout as appropriate r=davehunt
Bug 1001363 - Add Fulah / Pulaar-Fulfulde (ff) input method for Gaia
Bug 998118 - Dont display crashed background tabs. r=benfrancis
Bug 963234 - Switch to mozNotificationEvent r=mhenretty,alive
Bug 1002498 - Use mozL10n.once in Ringtones. r=dkuo
Merge pull request #18740 from allstarschh/Bug996522

Bug 996522 - [NFC] reset currentURL to null in Homescreen. r=alive
Bug 973440 - [settings] refactor Screen lock panel with AMD pattern
Merge pull request #18786 from zacc/bug_1003089

Bug 1003089 - Skip test_receive_call.py if the Plivo credentials are not...
Bug 1003740 - xx Contacts removed message is no longer hidden after deleting all contacts
Merge pull request #17557 from zacc/bug_983684

Bug 983684 - Detect device/b2g type and set gaiatest timeout as appropri...
Bug 996866 - [B2G][Facebook][Contacts] Update Imported Friends button does not sync profile photo
Bug 1003733 - Border radius is displayed before images are loaded in all lists (main list, import and link)
Merge pull request #18753 from stasm/1002498-ringtones-once

Bug 1002498 - Use mozL10n.once in Ringtones. r=dkuo
Bug 988259 - [TestAgent] The "small screen" css is broken
Bug 860881 - Open screenshot in gallery from notification. r=alive