Fix: Focus hotkey in road/tram stop building window (#12008)

src/road_gui.cpp

@@ -1582,7 +1582,11 @@ public:
 		this->InvalidateData();
 	}};
 
-	static inline HotkeyList hotkeys{"buildroadstop", {
+	static inline HotkeyList road_hotkeys{"buildroadstop", {
+		Hotkey('F', "focus_filter_box", BROSHK_FOCUS_FILTER_BOX),
+	}};
+
+	static inline HotkeyList tram_hotkeys{"buildtramstop", {
 		Hotkey('F', "focus_filter_box", BROSHK_FOCUS_FILTER_BOX),
 	}};
 };
@@ -1684,7 +1688,8 @@ static WindowDesc _road_station_picker_desc(__FILE__, __LINE__,
 	WDP_AUTO, "build_station_road", 0, 0,
 	WC_BUS_STATION, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
-	std::begin(_nested_road_station_picker_widgets), std::end(_nested_road_station_picker_widgets)
+	std::begin(_nested_road_station_picker_widgets), std::end(_nested_road_station_picker_widgets),
+	&BuildRoadStationWindow::road_hotkeys
 );
 
 /** Widget definition of the build tram station window */
@@ -1761,7 +1766,8 @@ static WindowDesc _tram_station_picker_desc(__FILE__, __LINE__,
 	WDP_AUTO, "build_station_tram", 0, 0,
 	WC_BUS_STATION, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
-	std::begin(_nested_tram_station_picker_widgets), std::end(_nested_tram_station_picker_widgets)
+	std::begin(_nested_tram_station_picker_widgets), std::end(_nested_tram_station_picker_widgets),
+	&BuildRoadStationWindow::tram_hotkeys
 );
 
 static void ShowRVStationPicker(Window *parent, RoadStopType rs)