Unexpected behavior with some auto advance setting

[zaknafean]

The problem

Describe the bug
The auto advance settings are a bit misleading and can cause confusion as certain settings don't work as you'd expect. The issue we found involved
Base Delay: 0
Additional Delay: None
Enabled: True

The expected result to me and others would be that the text would auto advance after the text finishes appearing with no additional delay. But what happens is no auto advance occurs at all. However if you add even .01 to the base delay or add some sort of additional delay, it works fine.

In general you probably DO want some delay in an auto advance, but in that case we shouldn't allow the combination of base delay 0, additional delay none to exist.

To Reproduce
Steps to reproduce the behavior:

1. Go to settings
2. Use these settings
   
3. Attempt to play a timeline
4. The timeline will not auto advance

Expected behavior
That the timeline will autoadvance, though to fast to read for most people.

System (please complete the following information):

• OS: Windows
• Godot Version: 4.2.1
• Dialogic Version: alpha 13

Solutions

Workaround

Adding any amount to base delay, or an additional delay fixes it.

Possible fixes
Easiest fix is to not allow a base delay of 0.

[Jowan-Spooner]

Yeah I could also fix autoadvance of 0 not working, although I agree that it likely has very few use-cases.

[coppolaemilio]

If we don't want to allow 0 it should have a red outline and display some warning, and if we want it but it is not technically possible we can always make it be 0.01 internally if the value is set to 0 😅

[Jowan-Spooner]

Actually I think I would just allow it and fix the bug. Having the delay at 0 is usually stupid, but I'm sure there are situations where it might make sense, especially when used with the autoadvance effect, for example if it should look as if someone was interrupted.