Merge pull request #20929 from crdlc/bug-1029479

Bug 1029479 - [Vertical Homescreen] Edit header is not centered
Merge pull request #20620 from Cwiiis/bug1026180

Bug 1026180 - Activate scrolling at bottom of edit header. r=jlal
Merge pull request #20695 from millermedeiros/1026924-current-time

Bug 1026924 - [Flame][Calendar] Current time indicator should be above event detail r=gaye
Merge pull request #20988 from mcav/gelam-epoch

Bug 941991 - [Email] Sync falls into the epoch. r=jrburke