Revert part of "Replace use of (deprecated) GtkLabel alignment."
This reverts part of d8730c41. It has mistakenly replaced Entry::set_alignment() with Widget::set_halign() instead of only replacing Misc::set_alignment(). Now the fields take up their full widths again, so the extra buttons (New, Find, ..., etc) are not far away. Conflicts: glom/utility_widgets/layoutwidgetbase.cc