QT: Slight layout change on the Options->Settings dialog.

wb/lib/wb/qt/wb_wtt_qt.cqt

@@ -2361,7 +2361,7 @@ void OptionsDialog::activate_options_cancel()
 OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
     : QDialog(parent), wtt(parent_ctx)
 {
-  setMinimumSize(650, 450);
+  setMinimumSize(600, 360);
   setWindowTitle(fl("Options"));
   setAttribute(Qt::WA_DeleteOnClose);
 
@@ -2373,10 +2373,12 @@ OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
 
   QVBoxLayout* hier_vbox = new QVBoxLayout();
   hier_vbox->addWidget(hier_label);
+  hier_vbox->setAlignment(hier_label, Qt::AlignHCenter);
   hier_vbox->addWidget(wtt->enable_comment_w);
   hier_vbox->addWidget(wtt->enable_revisions_w);
   hier_vbox->addWidget(wtt->show_plant_w);
   hier_vbox->addWidget(wtt->show_node_w);
+  hier_vbox->addStretch(1);
 
   QLabel* entry_label = new QLabel(fl("Entry"));
   wtt->show_class_w = new QCheckBox(fl("Class"));
@@ -2389,6 +2391,7 @@ OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
 
   QVBoxLayout* entry_vbox = new QVBoxLayout();
   entry_vbox->addWidget(entry_label);
+  entry_vbox->setAlignment(entry_label, Qt::AlignHCenter);
   entry_vbox->addWidget(wtt->show_class_w);
   entry_vbox->addWidget(wtt->show_alias_w);
   entry_vbox->addWidget(wtt->show_descrip_w);
@@ -2396,6 +2399,7 @@ OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
   entry_vbox->addWidget(wtt->show_objxref_w);
   entry_vbox->addWidget(wtt->show_attrref_w);
   entry_vbox->addWidget(wtt->show_attrxref_w);
+  entry_vbox->addStretch(1);
 
   QLabel* build_label = new QLabel(fl("Build"));
   wtt->build_force_w = new QCheckBox(fl("Force"));
@@ -2408,6 +2412,7 @@ OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
 
   QVBoxLayout* build_vbox = new QVBoxLayout();
   build_vbox->addWidget(build_label);
+  build_vbox->setAlignment(build_label, Qt::AlignHCenter);
   build_vbox->addWidget(wtt->build_force_w);
   build_vbox->addWidget(wtt->build_debug_w);
   build_vbox->addWidget(wtt->build_crossref_w);
@@ -2415,6 +2420,7 @@ OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
   build_vbox->addWidget(wtt->build_crossrefgraph_w);
   build_vbox->addWidget(wtt->build_manual_w);
   build_vbox->addWidget(wtt->build_nocopy_w);
+  build_vbox->addStretch(1);
 
   QHBoxLayout* hbox = new QHBoxLayout();
   hbox->addLayout(hier_vbox);
@@ -2441,6 +2447,11 @@ OptionsDialog::OptionsDialog(WttQt* parent_ctx, QWidget* parent)
 
   setLayout(vbox);
   show();
+
+  int size = wtt->show_node_w->height();
+  hier_vbox->setSpacing(size);
+  entry_vbox->setSpacing(size);
+  build_vbox->setSpacing(size);
 }
 
 void WttQt::create_options_dialog()