Add image-sized window restoration feature

[SKProCH]

Summary

Make behavior identical with Picasa - when the user clicks outside the image:

• Resize the window to photo's size
• Move the window to the same position as photo was (in absolute screen coordinates), so photo visually stay in place

Motivation described in #218

Type of change

• Bug fix
• New feature
• Localization (new language or translation fix)
• Documentation
• Other

Related issue

#128

How was this tested?

• Built and ran locally
• Tested with real image files

Localization (if applicable)

• name attributes are unchanged and match en-US
• Files saved as UTF-8

Checklist

• I have reviewed and understand every line of this change.
• This change is focused and avoids unrelated or low-value edits.

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Animation.mp4

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AI was used to write Win32 related stuff.

[SKProCH]

Probably there should be also 2 more features:

• Double click on the image will open fullscreen back
• Allow to size window in the way, when the controls and previews of other files will be below the image

But keeping this PR focused

[2590812378]

这是非常好的功能，期待已久