move config value into ui

browser/main/Detail/MarkdownNoteDetail.js

@@ -47,7 +47,7 @@ class MarkdownNoteDetail extends React.Component {
       isLockButtonShown: props.config.editor.type !== 'SPLIT',
       isLocked: false,
       editorType: props.config.editor.type,
-      isStacking: props.config.editor.isStacking,
+      isStacking: props.config.ui.isStacking,
       switchPreview: props.config.editor.switchPreview
     }
 
@@ -360,7 +360,7 @@ class MarkdownNoteDetail extends React.Component {
     this.setState({ isStacking: type }, () => {
       this.focus()
       const newConfig = Object.assign({}, this.props.config)
-      newConfig.editor.isStacking = type
+      newConfig.ui.isStacking = type
       ConfigManager.set(newConfig)
     })
   }

browser/main/lib/ConfigManager.js

@@ -42,7 +42,8 @@ export const DEFAULT_CONFIG = {
     showCopyNotification: true,
     disableDirectWrite: false,
     defaultNote: 'ALWAYS_ASK', // 'ALWAYS_ASK', 'SNIPPET_NOTE', 'MARKDOWN_NOTE'
-    showMenuBar: false
+    showMenuBar: false,
+    isStacking: false
   },
   editor: {
     theme: 'base16-light',
@@ -62,7 +63,6 @@ export const DEFAULT_CONFIG = {
     delfaultStatus: 'PREVIEW', // 'PREVIEW', 'CODE'
     scrollPastEnd: false,
     type: 'SPLIT', // 'SPLIT', 'EDITOR_PREVIEW'
-    isStacking: false,
     fetchUrlTitle: true,
     enableTableEditor: false,
     enableFrontMatterTitle: true,