Edc update screenshots and support ref cursor

[v1m2k3]

1. Updated the screen shots.
2. Update text w.r.t the value on the button.
3. Added new screenshots for REF CURSOR.

[CLAassistant]

All committers have signed the CLA.

[quinntracy]

@v1m2k3 Can we add some additional details to accompany the new Ref Cursor screenshots (now Section 6.1)? The screenshots alone don't indicate what steps the user should be taking to use Ref Cursors, so any additional information we can provide on how to best utilize the screenshot content will be helpful.