Big Update!
Thanks to the new 9.2.7 update on Epsilon. You can now send a message all at once without the 256 char limit. So that saves from doing a loop for each block and we can just do it all at once. So the addon has been improved as a result, no more text suddenly disappearing after saving!
Also, still impossible to know what page you're on, so can't really put the page number that each option goes to, and I can't even show what page you're currently on, but other than that everything else works!
Edit: To use the addon, just type the command "/gtable" and the window will popup on your screen.
GossipTable.zip