Introduce RestoreButton component instead of plain JSX

browser/main/Detail/MarkdownNoteDetail.js

@@ -19,6 +19,7 @@ import AwsMobileAnalyticsConfig from 'browser/main/lib/AwsMobileAnalyticsConfig'
 import ConfigManager from 'browser/main/lib/ConfigManager'
 import TrashButton from './TrashButton'
 import FullscreenButton from './FullscreenButton'
+import RestoreButton from './RestoreButton'
 import PermanentDeleteButton from './PermanentDeleteButton'
 import InfoButton from './InfoButton'
 import ToggleModeButton from './ToggleModeButton'
@@ -324,10 +325,7 @@ class MarkdownNoteDetail extends React.Component {
 
     const trashTopBar = <div styleName='info'>
       <div styleName='info-left'>
-        <i styleName='undo-button'
+        <RestoreButton onClick={(e) => this.handleUndoButtonClick(e)} />
-          className='fa fa-undo fa-fw'
-          onClick={(e) => this.handleUndoButtonClick(e)}
-        />
       </div>
       <div styleName='info-right'>
         <PermanentDeleteButton onClick={(e) => this.handleTrashButtonClick(e)} />

browser/main/Detail/RestoreButton.js

@@ -0,0 +1,21 @@
+import PropTypes from 'prop-types'
+import React from 'react'
+import CSSModules from 'browser/lib/CSSModules'
+import styles from './RestoreButton.styl'
+
+const RestoreButton = ({
+  onClick
+}) => (
+  <button styleName='control-restoreButton'
+    onClick={(e) => onClick(e)}
+  >
+    <i className='fa fa-undo fa-fw' styleName='iconRestore' />
+    <span styleName='tooltip'>Restore</span>
+  </button>
+)
+
+RestoreButton.propTypes = {
+  onClick: PropTypes.func.isRequired
+}
+
+export default CSSModules(RestoreButton, styles)

browser/main/Detail/RestoreButton.styl

@@ -0,0 +1,22 @@
+.control-restoreButton
+  top 115px
+  topBarButtonRight()
+  &:hover .tooltip
+    opacity 1
+
+.tooltip
+  tooltip()
+  position absolute
+  pointer-events none
+  top 50px
+  left 25px
+  z-index 200
+  padding 5px
+  line-height normal
+  border-radius 2px
+  opacity 0
+  transition 0.1s
+
+body[data-theme="dark"]
+  .control-restoreButton
+    topBarButtonDark()

browser/main/Detail/SnippetNoteDetail.js

@@ -20,6 +20,7 @@ import _ from 'lodash'
 import { findNoteTitle } from 'browser/lib/findNoteTitle'
 import AwsMobileAnalyticsConfig from 'browser/main/lib/AwsMobileAnalyticsConfig'
 import TrashButton from './TrashButton'
+import RestoreButton from './RestoreButton'
 import PermanentDeleteButton from './PermanentDeleteButton'
 import InfoButton from './InfoButton'
 import InfoPanel from './InfoPanel'
@@ -588,10 +589,7 @@ class SnippetNoteDetail extends React.Component {
 
     const trashTopBar = <div styleName='info'>
       <div styleName='info-left'>
-        <i styleName='undo-button'
+        <RestoreButton onClick={(e) => this.handleUndoButtonClick(e)} />
-          className='fa fa-undo fa-fw'
-          onClick={(e) => this.handleUndoButtonClick(e)}
-        />
       </div>
       <div styleName='info-right'>
         <PermanentDeleteButton onClick={(e) => this.handleTrashButtonClick(e)} />