Added new startup flag openrocket.debug.layout which when set, shows
boxes around all the components in miglayout.  Hopefully this will help
fix various layout issues in the applicaiton.
Improve layout of component tree buttons after updating miglayout.
Ignore the NPE which happens when dropping a rocket component as the
last component in the previous child element.  I can't seem to find a
better solution than to just eat the npe.
Update the tab indexes.  Fix a problem where copying on the simulation
tab switched to the configuration tab
Merge pull request #170 from kruland2607/master

Bug fixes.