Bug 1039445 - Preventing a race where the LayoutManager compute an available height of 0.
Bug 1040290 - remedying the visibility conflict between the value selector and the system dialog that triggers it.
Bug 1040070 - Follow-up, revert change to default number of columns r=me
Merge pull request #21926 from etiennesegonzac/bug-1039445

Bug 1039445 - Preventing a race where the LayoutManager compute a 0 height. r=alive
Merge pull request #21945 from yzen/bug-1040290

Bug 1040290 - remedying the visibility conflict between the value select...
Merge pull request #21889 from guilherme-pg/bug1038881-wakelock

Bug 1038881 - Use a wakelock to keep Find My Device alive when necessary...
Bug 1040935 - Close Find My Device when FxA fails to initialize.