Merge pull request #10992 from leob2g/Bug_894196_CB_msg_title_error

Bug 894196 - [CB] Disapper the title background alert and need to display. r=daleharvey(cherry picked from commit 9c75c6100df2f70c30a68518ae9a5399b31537c1)
(cherry picked from commit 27124565251e6e7cbf8c9772cc9eeee0aabd8c48)
Merge pull request #11200 from fabi1cazenave/cellBroadcastLabel-bug890151

Bug 890151 - [CB] CH50 message should not be displayed when the Cell Broadcast service is off, r=kaze(cherry picked from commit ad923e915a38394497da682c3024ccc37390b52a)