Another two straightforward refactoring tasks for Language support

[WebsiteDeveloper]

@DennisKehrig i completed two other straightforward refactoring tasks one concerning the QuickEdit feature and the other the CSSInlineEditor

[DennisKehrig]

@WebsiteDeveloper Wonderful, I'm excited! :)

Two extensions also use the QuickOpen API:

• Brackets Commands Guide
• Editor Navigation Shortcuts for Brackets

If you want to, you could submit pull requests to both that can be merged shortly after merging this.
Or add backwards compatibility (and a warning) by safely converting pluginDef.fileTypes to pluginDef.languageIds by mapping the file types to language IDs, I will then open issues in the extensions' repositories and the author can get to them whenever he feels like.

@peterflynn These are your extensions, any comments?

[WebsiteDeveloper]

@DennisKehrig i added the backwards compatibility code.

[DennisKehrig]

That was quick, thanks! I'll try to keep up :)

[DennisKehrig]

Sorry for commenting on the commits directly, this makes it confusing to read here.

[DennisKehrig]

Done with my first review!

[WebsiteDeveloper]

@DennisKehrig changes pushed

[DennisKehrig]

Looking good, merging!

[DennisKehrig]

@WebsiteDeveloper That was an awesome session, thank you very much!