Give help content box a reasonable line height for legibility

Change-Id: I0a402236f76e8081230c9f48a25333603669080d
Remove CSS hack for positioning popupButtonWidget

The anchor position is handled correctly in the code now.

Change-Id: I2a6454103e376add98d576bfda75292c96cfe6a5
Merge "Remove CSS hack for positioning popupButtonWidget"
Merge "Give help content box a reasonable line height for legibility"