Keep context menu open after selecting "more" or "earlier items"

We remember the last location of the context menu, and in this
case rebuild the menu and relaunch in the same place.

src/play_controller.cpp

@@ -728,6 +728,8 @@ bool play_controller::execute_command(const hotkey::hotkey_command& cmd, int ind
 		} else if ( i < wml_commands_.size()  &&  wml_commands_[i] ) {
 			if (!wml_command_pager_->capture(*wml_commands_[i])) {
 				wml_commands_[i]->fire_event(mouse_handler_.get_last_hex());
+			} else { //relaunch the menu
+				show_menu(get_display().get_theme().context_menu()->items(),last_context_menu_x_,last_context_menu_y_,true, get_display());
 			}
 			return true;
 		}
@@ -1091,6 +1093,12 @@ void play_controller::expand_wml_commands(std::vector<std::string>& items)
 
 void play_controller::show_menu(const std::vector<std::string>& items_arg, int xloc, int yloc, bool context_menu, display& disp)
 {
+	if (context_menu)
+	{
+		last_context_menu_x_ = xloc;
+		last_context_menu_y_ = yloc;
+	}
+
 	std::vector<std::string> items = items_arg;
 	const hotkey::hotkey_command* cmd;
 	std::vector<std::string>::iterator i = items.begin();

src/play_controller.hpp

@@ -281,6 +281,8 @@ class play_controller : public controller_base, public events::observer, public
 	void expand_wml_commands(std::vector<std::string>& items);
 	std::vector<const_item_ptr> wml_commands_;
 	boost::scoped_ptr<wmi_pager> wml_command_pager_;
+	int last_context_menu_x_;
+	int last_context_menu_y_;
 
 	bool victory_when_enemies_defeated_;
 	bool remove_from_carryover_on_defeat_;