Bug 939307 - [Settings] Fix markup of some developer settings to no pack-checkbox layout.
Merge pull request #13760 from eeejay/bug-939307

Bug 939307 - [Settings] Fix markup of some developer settings to no pack... r=kaze
Bug 882186 - add basic net_error.html functionality
Merge pull request #13494 from mikehenrty/bug-882186-mvp

Bug 882186 - add basic net_error.html functionality, r=vingtetun
Bug 920164 - [MMS] Display the subject of an MMS, if present