Add ReactEditorView::getFontSize

src/editor-component.coffee

@@ -715,6 +715,8 @@ EditorComponent = React.createClass
                   console.log "Wasted"
                   ReactPerf.printWasted()
 
+  getFontSize: -> @state.fontSize
+
   setFontSize: (fontSize) ->
     @setState({fontSize})
 

src/react-editor-view.coffee

@@ -127,4 +127,7 @@ class ReactEditorView extends View
   getLastVisibleScreenRow: ->
     @editor.getVisibleRowRange()[1]
 
+  getFontSize: ->
+    @component?.getFontSize()
+
   requestDisplayUpdate: -> # No-op shim for find-and-replace