Merge pull request #11055 from fabi1cazenave/smsCursorScroll-bug875338

Bug 875338: the content is not scrolled down when sending an MMS, r=gnarf
Revert "Merge pull request #11055 from fabi1cazenave/smsCursorScroll-bug875338"

This reverts commit 96e8da02b834bc15fc4adc402b40c08ba36b2a59, reversing
changes made to b3fb4af5ef69ac087afc77329fdd82d5c6d122a0.
Bug 875338: the content is not scrolled down when sending an MMS, r=julienw