Change inspect dialog to use source formatting.  This is the first step in implementing #725.  By itself, it removes some useful labels from the dialog.  However, I still prefer this to the old formatting, which could get unreadable.  I will replace the labels with tool tips as described in the issue.
Change inspect dialog to use source formatting.  This is the first step
in implementing #725.  By itself, it removes some useful labels from the
dialog.  However, I still prefer this to the old formatting, which could
get unreadable.  I will replace the labels with tool tips as described
in the issue.

pranjaltale16/codeworld,alphalambda/codeworld,pranjaltale16/codeworld,google/codeworld,google/codeworld,alphalambda/codeworld,alphalambda/codeworld,pranjaltale16/codeworld,google/codeworld