[Design] Reload options dialog text is confusing

[Philippe Bossut]

Mimi Yin wrote:
> What if we just made it a 2 button dialog? (Also trying to avoid 
> jargon like repository and migrate.)
>
> ===
> Your data was created by an incompatible version of Chandler.
>
> In order to proceed, all of your existing data must be deleted. To 
> preserve your data, <LINK>follow instructions on how to move data from 
> one version of Chandler to another.
>
> [Cancel] [Delete Data]
> ===
I think it leaves the user too much in a lurch. I prefer the 3 options 
proposed by Dan: at that point in the code, there are few enough things 
to do that we can afford to be super detailed and explicit for each.

Cheers,
- Philippe