ImageGlom: Size request corrections.
* glom/utility_widgets/imageglom.cc: init(): Remove the set_size_request() call which does not seem necessary. Do not call set_image(original) after scale(), because scale() does that, setting the scaled image. This avoids the GtkImage being huge, because GtkImage re-requests the bigger size again when the original is put in it. This is still not ideal. It would be nicer if we could just say "do not make the window bigger than the screen, or do not make this make the window bigger."