message: Prevent text window from overflowing too far (closes
diff: @@ -63,14 +63,16 @@ block-sidebar-breakpoint = 950px
  width 90%
  max-width 740px
  margin (unit * 2) auto
  - overflow-x auto
  padding unit * 2
  text-align left
  min-height 80vh
  font-size 1.2rem
  line-height 1.7em
  max-height 75vh
  - overflow scroll
  + overflow-x scroll
  +
  + &.is-editing
  + overflow-x visible
  +below(800px)
  height 50vh
  