Honor editor's scrollSensitivity parameter

src/text-editor-component.js

@@ -1486,7 +1486,7 @@ class TextEditorComponent {
   }
 
   didMouseWheel (event) {
-    const scrollSensitivity = this.props.mouseWheelScrollSensitivity || 0.8
+    const scrollSensitivity = this.props.model.getScrollSensitivity() / 100
 
     let {deltaX, deltaY} = event
     deltaX = deltaX * scrollSensitivity

src/text-editor.coffee

@@ -98,7 +98,6 @@ class TextEditor extends Model
   registered: false
   atomicSoftTabs: true
   invisibles: null
-  scrollSensitivity: 40
 
   Object.defineProperty @prototype, "element",
     get: -> @getElement()
@@ -156,7 +155,7 @@ class TextEditor extends Model
       @softTabs, @initialScrollTopRow, @initialScrollLeftColumn, initialLine, initialColumn, tabLength,
       @softWrapped, @decorationManager, @selectionsMarkerLayer, @buffer, suppressCursorCreation,
       @mini, @placeholderText, lineNumberGutterVisible, @showLineNumbers, @largeFileMode,
-      @assert, grammar, @showInvisibles, @autoHeight, @autoWidth, @scrollPastEnd, @editorWidthInChars,
+      @assert, grammar, @showInvisibles, @autoHeight, @autoWidth, @scrollPastEnd, @scrollSensitivity, @editorWidthInChars,
       @tokenizedBuffer, @displayLayer, @invisibles, @showIndentGuide,
       @softWrapped, @softWrapAtPreferredLineLength, @preferredLineLength,
       @showCursorOnSelection
@@ -172,6 +171,7 @@ class TextEditor extends Model
 
     @mini ?= false
     @scrollPastEnd ?= false
+    @scrollSensitivity ?= 40
     @showInvisibles ?= true
     @softTabs ?= true
     tabLength ?= 2