Revert "Bug 986329 - Fix test_settings_XXX.py with JavascriptException: TypeError: window.wrappedJSObject.Settings is undefined"

This reverts commit fab38c4384733c3eed51ceaec2787c7d5962dcd3.
Bug 986329 - Fix test_settings_XXX.py with JavascriptException: TypeError: window.wrappedJSObject.Settings is undefined
Bug 975535 - [VsD Refresh] Update App Icons in Homescreen & Settings/App Permissions
Bug 988399 - [B2G][Contacts] Contacts birthday set to January first incorrectly shows previous year
Bug 987283 -usage app cold_load_launch regressed 300ms Mar 22
Bug 975535 - E.me followups [r=ranbena]
Bug 969525 - Wrong message exporting contacts with USBStorage enabled

Fixed:
- Rewrite updateStorageOptions function for better readability
- Got rid of Settings dependency
- Tests added for export, fixed for import
Bug 988484 - [Camera] HUD blinks on startup
Bug 988441 - [Camera][Madai][Mozilla][UX] 1.4 Image Preview text should match confirmation text
Bug 971553 - [System2] Instantiable SoftwareButtonManager r=alive
Bug 989104 - [email] allow for longer module load timeouts for background loads
Bug 964653 - (system-dialog) [Window Management] Implement System Dialog Window
Bug 960915 - (emergencycall-as-app) [LockScreen][EmergencyCall] Make EmergencyCall as an app
Merge pull request #17744 from ian-liu/system2/bug964653_system_dialog_refactor

Bug 964653 - (system-dialog) [Window Management] Implement System Dialog Window, r=@alivedise
Merge pull request #17712 from wilsonpage/bug/988484

Bug 988484 - [Camera] HUD blinks on startup
Bug 988519 - [Camera] Improve localization
Bug 985680 - [Camera][Mozilla][UX] 1.4 Video record active button style not to spec
Merge pull request #17726 from wilsonpage/bug/988441

Bug 988441 - [Camera][Madai][Mozilla][UX] 1.4 Image Preview text should ...
Merge pull request #17736 from snowmantw/issue960915-emergencycall-as-app

Bug 960915 - (emergencycall-as-app) [LockScreen][EmergencyCall] Make EmergencyCall as an app
Revert "Bug 986846 - [settings] additional white space next to 'privacy policy' link in page about crash reports. r=evelyn"

This reverts commit b49429f4cacb8085d2bc420d83c094aeda404e88.