Fix restoring Preferences dialog

Thomas Holderrequested to merge
speleo3/inkscape:inbox-3055-alt into master
  • Remove Gtk::Main::iteration() calls from Preferences dialog. This code landed in 2006 (b6fd495a) with a very harmless change without any explanation. It doesn't look like it's needed for anything, and removing it fixes inbox#3055 (closed)
  • Fix restoring page
Edited by Thomas Holder

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