Display progress %

mail.js

@@ -364,6 +364,7 @@ class MainWindow extends React.PureComponent
             <FolderList
                 accounts={this.state.accounts}
                 progressText={this.state.progressText}
+                progressPercent={this.state.progressPercent}
                 startResync={this.startResync}
                 loadFolder={this.loadFolder}
             />