Skip introduction dialogs when there are multiple choices

[Ellypse]

When an NPC has several quests behind several paragraphs of introductory text, it is annoying to have to go through every paragraph to get back to the choices.

• The easy solution: have an option to always show dialog choices, no matter the advancement in the dialogs steps
• Another idea: when we open the same dialog a second time, go to the end of it (we would need to remember the previous dialog and a timeout, like 2 minutes, to start over).