Fixed Issue #5531 -- Re-arranged placement of shortcut info in keyboard popup

Closes #5531. This is the better version; I closed the previous PR.

Users were confused on how to use keyboard shortcuts because the pop-up
window documentation was confusing. I changed the help_indices to move the items around in the shortcut popup.

Screenshot: 
![keyboard_shortcuts_v2](https://cloud.githubusercontent.com/assets/954858/2732105/2e765024-c636-11e3-8ccb-90fc846e51f6.png)