Bug 1050431: Remove unnecessary 'flex' decls from video.css (equivalent to default values). r=djf
Bug 1035775 - [B2G][System] support 24 hour time format

- add timeformatchange listener
Merge pull request #22854 from dholbert/1050431-remove-lines

Bug 1050431: Remove unnecessary 'flex' decls from video.css (equivalent to default values). r=djf
Merge pull request #22757 from gasolin/issue-1035775

Bug 1035775 - [B2G][System] support 24 hour time format, r=alive
Revert "Merge pull request #22867 from yurenju/pull/22765"

This reverts commit 5f51ff804b815033cd71e750c52cf19fd3950f29, reversing
changes made to 67f0e561b524f1e80468e9536a65cd7db6fcb8cb.
Bug 1054122 - There are still some redundant BT code in settings app