Batch process wizard redesign COMPLETE!

The old Batch Convert form has been completed removed from the project.
It is 100% superceded by the new Batch Process Wizard.  All features
from the old tool are present*, along with many new features.

* The old dialog allowed the user to specify JPEG compression.  This has
not yet been added to the new dialog.  I am still prototyping some ideas
for setting image format options, but it will take some time to actually
implement it.

I am very glad to have this done.