Disable scrolling on the horizontal scroller when soft wrap is on.

static/editor.css

@@ -12,10 +12,6 @@
   -webkit-user-select: none;
 }
 
-.editor.soft-wrap {
-  overflow-x: hidden;
-}
-
 .editor .content {
   display: -webkit-flexbox;
 }
@@ -36,6 +32,10 @@
   width: -webkit-flex(1);
 }
 
+.editor.soft-wrap .horizontal-scroller {
+  overflow-x: hidden;
+}
+
 .editor .lines {
   position: relative;
   display: table;