add missing ui_splitpane_args_set_position_property

add position_property splitpane arg (GTK)

implement splitpane value/varname args (GTK)

add ui_window_default_size function (GTK)

remember app window size (GTK)

improve ui_set_property

implement spinbox min/max args (QT)

add spinbox min/max args (GTK)

fix spinbox var initialization

rename ui_range_set_value/ui_range_get_value

(0) -300 -100 -10 +10 +100 tip

mercurial