Now, as I'm sure you guys know, you can't bump all of your trades at once, HOWEVER, I found a way to do it incredibly quickly compared to the method you guys probably use. I will explain it step by step.

1. Open all your trades at once using ctrl+left mouse click (or you could bookmark them all in a folder and open them all in that way by right clicking on the folder).

2. Go to your first tab and zoom out to about ~75% (depending on what trades your doing this might differ, but it has to be enough that you can see the bump trade button without scrolling)

3. Click "Bump Trade"

4. Press the Spacebar. This should automatically press the OK button (if you're on google chrome)

5. Press Ctrl + W

6. Repeat until you're done

NOTES:
This might not work if u have very high item and low item trades, but if you're like me and only trade 1 row of items, you won't have to move your mouse at all.