Recipe Editor Description Scrollbar

[dsavransky]

The Descriptions for primitive inputs are truncated at the edge of the recipe editor window, and many of them are long enough that one would want to be able to scroll and see the mini descriptions of the options.

For example:
In the "Destripe Science Image" primitive, the parameter description for "method_microphonics" just reads "Method applied for microphonics 1: model projection. 2: all to zero. 3: g ... " and is then cutoff

The scrollbar at the bottom of the parameters window slides, and the text moves over in the window, but is still cutoff. the only way to see all of the description is to slide the scrollbar over and then drag the column width at the top of the frame. It took me a really long time to figure this out, and it would be a bit more user friendly if we just set the default width of the Description column to be bigger.

[mperrin]

Legacy issue migrated from redmine issue tracker. Originally filed by @kfollette on 2016-03-10