Move syncsroll under lib

public/js/index.js

@@ -65,7 +65,7 @@ import {
     setupSyncAreas,
     syncScrollToEdit,
     syncScrollToView
-} from './syncscroll'
+} from './lib/syncscroll'
 
 import {
     writeHistory,

public/js/lib/syncscroll.js

@@ -4,8 +4,8 @@
 
 import markdownitContainer from 'markdown-it-container'
 
-import { md } from './extra'
-import modeType from './lib/editor/modeType'
+import { md } from '../extra'
+import modeType from '../lib/editor/modeType'
 
 function addPart (tokens, idx) {
   if (tokens[idx].map && tokens[idx].level === 0) {