Prevent clicking on HUD widgets from acting on the map

Clicking on a widget displayed on top of the map was sometimes triggering
actions as if the map had been clicked underneath. Prevent this by disabling
the propagation of mouse events to the parent widget.

Closes longturn#687.

client/gui-qt/citydlg.cpp

@@ -1321,6 +1321,11 @@ city_dialog::city_dialog(QWidget *parent) : QWidget(parent)
   small_font = fcFont::instance()->getFont(fonts::notify_label);
   ui.setupUi(this);
 
+  // Prevent mouse events from going through the panels to the main map
+  for (auto child : findChildren<QWidget *>()) {
+    child->setAttribute(Qt::WA_NoMousePropagation);
+  }
+
   setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
   setMouseTracking(true);
   selected_row_p = -1;

client/gui-qt/page_game.cpp

@@ -115,20 +115,27 @@ pageGame::pageGame(QWidget *parent)
   sidebar_wdg->addWidget(sw_endturn);
 
   civ_status = new civstatus(mapview_wdg);
+  civ_status->setAttribute(Qt::WA_NoMousePropagation);
   civ_status->show();
 
   city_overlay = new city_dialog(mapview_wdg);
   city_overlay->hide();
   minimapview_wdg = new minimap_view(mapview_wdg);
+  minimapview_wdg->setAttribute(Qt::WA_NoMousePropagation);
   minimapview_wdg->show();
   unitinfo_wdg = new hud_units(mapview_wdg);
+  unitinfo_wdg->setAttribute(Qt::WA_NoMousePropagation);
   battlelog_wdg = new hud_battle_log(mapview_wdg);
+  battlelog_wdg->setAttribute(Qt::WA_NoMousePropagation);
   battlelog_wdg->hide();
   infotab = new info_tab(mapview_wdg);
+  infotab->setAttribute(Qt::WA_NoMousePropagation);
   infotab->show();
   x_vote = new xvote(mapview_wdg);
+  x_vote->setAttribute(Qt::WA_NoMousePropagation);
   x_vote->hide();
   gtd = new goto_dialog(mapview_wdg);
+  gtd->setAttribute(Qt::WA_NoMousePropagation);
   gtd->hide();
 
   game_layout->addWidget(mapview_wdg, 1, 0);