Screen title behavior is misleading

[luisrudge]

Currently, we always use the languageDictionary.title entry for the first screen loaded (which can be changed with the initialScreen option). So, even though you set languageDictionary.forgotPasswordTitle, if you set initialScreen: forgotPassword, it will use languageDictionary.title as the string and not languageDictionary.forgotPasswordTitle. This becomes a particular hard issue to handle if you're trying to use Lock's internal i18n dictionary, since you'd have to override forgotPasswordTitle based on which language you're trying to load Lock with.

After some discussion, we agreed to have the behavior changed to:

Assuming we're in the forgot password screen, for example:

• If you have a screen specific title (languageDictionary.forgotPassswordTitle), use that
• Else use Lock's default dictionary entry for that screen