select new file after copy and paste

[janmarek]

• You usually want to do something (rename, delete) with the new file, not the old one.
• New file would be more easy to find.
• It is a standard behavior in tree views and file managers.

[glangford]

@janmarek What do you suggest the behaviour should be in the case of error - for example, 4 files are selected and only 3 are successfully pasted.

[janmarek]

I don't know. Error during pasting is quite rare, isn't it? I guess the successfully pasted files should be selected.

[glangford]

That makes sense to me as well. I suspect it is rare, I only ask since it has to be addressed as part of a fix.

[glangford]

@janmarek Proposed fix, screenshot, and some commentary in #631.