You can now undo certain actions on Gmail mobile web app

Gmail mobile web app has recently been updated. Now when you use the application, you’ll have a small window of opportunity to undo four key actions: archive, delete, add or remove a label, or move a message/conversation. When you take one of these actions, Gmail displays a yellow bar that recaps what you just did and allows you to undo it. The new update is available for phones running Android or iOS, but not tablet devices with the two-pane Gmail UI. It is also now available for BlackBerry OS 6.0 phones. Just try it out at gmail.com in the browser of your Android or iOS device!