Hows this for an idea for IDEA folks...
You're editing a JSP page, select some content and extract to a
properties file for I18N, but have IDEA continue to display the
extracted content so you can still follow what your looking at.
This text should be extracted
some.string=This text should be extracted
However, continue to display the original, but make it read-only and
greyed out/boxed/highlighted somehow that the text is a reference.
This would allow you to quickly look at a JSP page and know the context
of what your looking at rather than "some.string" - IDEA could provide a
quick means to change the rendered locale etc.