Bug 964517 - Add solid background to apps where appropriate. r=alive
Bug 973787 - [Gaia] SD card formatting: reword message and appearance of the format button

New main string suggested by :matej
Merge pull request #16430 from theres-waldo/master

Bug 964517 - Add solid background to apps where appropriate. r=alive
Merge pull request #16385 from flodolo/bug973787

Bug 973787 - [Gaia] SD card formatting: reword message and buttons