Moved SWKR list gen to script files and made mods

It now will work well with the FUNCTIONS FILE (as opposed to the
original which used Wabasha-specific X1s), and will also do more than
one worker at once. Thanks @ramonalisa1 for the contribution! This
resolves issue #124.
Added Lisa's SWKR script to dialog, and changed dialog name

Dialog name reflects newer title of script, somehow this didn't get
updated after I originally drafted it up.