P: Tell the user why Denoise and Raw Details are greyed out

[johnrellis]

The Enhance dialog should explain why Denoise or Raw Details are greyed out by providing a simple explanation:

Denoise and Raw Details don't work on the selected file types: <file types>

where <file types> provides the precise file formats of the selected files: mRAW, sRAW, linear DNG, JPEG, TIFF, PSD, PSB, etc.  LR has that information internally -- it just needs to show it to the user.

In addition, Learn More should link to a page that provides a comprehensible explanation. Right now, it just says "any Bayer or X-Trans RAW files" -- how many non-nerd users know what those are?

This trivial change would avoid hours of user frustrations and needless FAQs here.

[TheDigitalDog]

Just got my vote! 

[SeanMcCormack]

Gets mine too. 

[DdeGannes]

Agreed.