Open file menu action now works.
Save and save as are now working.
Now updating the rosparam robot description when a file is opened
or saved. Still need to add the publisher
Right now everything is happening on one thread, the publisher only runs
when the file is open and the editor doesn't refresh so you need to open
a second copy to see the updates, however, it does successfully publish
the urdf to the right TF prefix and set the proper ros parameter.
Robot Preview now refreshes itself. Still need to add in
separate publishing thread.