Fix more style warnings

browser/components/ModalEscButton.js

@@ -8,7 +8,7 @@ const ModalEscButton = ({
 }) => (
   <button styleName='escButton' onClick={handleEscButtonClick}>
     <div styleName='esc-mark'>×</div>
-    <div styleName='esc-text'>esc</div>
+    <div>esc</div>
   </button>
 )
 

browser/components/SnippetTab.js

@@ -114,7 +114,7 @@ class SnippetTab extends React.Component {
           >
             {snippet.name.trim().length > 0
               ? snippet.name
-              : <span styleName='button-unnamed'>
+              : <span>
                 {i18n.__('Unnamed')}
               </span>
             }

browser/main/Detail/SnippetNoteDetail.js

@@ -808,7 +808,7 @@ class SnippetNoteDetail extends React.Component {
 
     const detailTopBar = <div styleName='info'>
       <div styleName='info-left'>
-        <div styleName='info-left-top'>
+        <div>
           <FolderSelect styleName='info-left-top-folderSelect'
             value={this.state.note.storage + '-' + this.state.note.folder}
             ref='folder'

browser/main/modals/PreferencesModal/FolderList.js

@@ -22,7 +22,7 @@ class FolderList extends React.Component {
     })
 
     return (
-      <div styleName='folderList'>
+      <div>
         {folderList.length > 0
           ? folderList
           : <div styleName='folderList-empty'>{i18n.__('No Folders')}</div>

browser/main/modals/PreferencesModal/index.js

@@ -147,7 +147,7 @@ class Preferences extends React.Component {
           key={tab.target}
           onClick={(e) => this.handleNavButtonClick(tab.target)(e)}
         >
-          <span styleName='nav-button-label'>
+          <span>
             {tab.label}
           </span>
           {isUiHotkeyTab ? this.haveToSaveNotif(tab[tab.label].type, tab[tab.label].message) : null}