glade-editor-property.c - glade_eprop_text_create_input():
  gtk_widget_set_size_request () should get the actual pixels per line, not just assume 15
  also, it shouldn't have to get a fixed width of 280, rather the whole coloumn should increase size if there is space available


When vuc.xml - version="x.y" is set correctly (to "0.0" or "0.1"), with gtk 2.20.1 we get a
  Project "demo.glade" has deprecated widgets and/or version mismatches.
  [window1:vbox1:hbox2:vuc_button1] Property 'Use Action Appearance' of object class 'VUC Button' was introduced in VUC 0.16
The .16 seems to come from gtk ('Use Action Appearance' was introduced in 2.16) but VUC 0. is wrong...
