Fixed some widget management errors in the Show Text dialog's close
method. Ensure Text Dislog's close method is called when swapping
Nsharp display.
Change-Id: I6e645aa552980b49e552a2830f9f148d95f27f3b
Former-commit-id: 3f6c7ef92c [formerly 0ff12f2c322d9cbed696f9ee4f2049d9efed7863]
Former-commit-id: ba72d87f07