Open RAW data button for embedded preview

[golemus]

There seem to be couple of issues related to viewing RAW images.

- it is hard to know if the image on the screen is preview or rendered RAW data
- there is no simple way to switch between viewing rendered RAW data and preview

One suggestion is that when you have enabled "embedded preview" is that there could be button at corner of display: "Open RAW Data"

It could be in Settings menu like this:
- enable "Open Raw Data" button while viewing RAW-file embedded preview

When you press this button it opens RAW data.

In raw data view there could be possibly "return to embedded preview" button.


Although if half-width RAW image is enabled I am not sure what would be most sensible behaviour.

[user0]

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