Merge branch 'custom_bridgeheads' into jgrpp

# Conflicts:
#	docs/landscape_grid.html
#	src/roadveh_cmd.cpp
#	src/saveload/afterload.cpp
#	src/saveload/extended_ver_sl.cpp
#	src/saveload/extended_ver_sl.h
#	src/settings_gui.cpp
#	src/settings_type.h
#	src/tunnelbridge_cmd.cpp
#	src/tunnelbridge_map.h

src/company_gui.cpp

@@ -2478,6 +2478,15 @@ void DirtyCompanyInfrastructureWindows(CompanyID company)
 	SetWindowDirty(WC_COMPANY_INFRASTRUCTURE, company);
 }
 
+/**
+ * Redraw all windows with all company infrastructure counts.
+ */
+void DirtyAllCompanyInfrastructureWindows()
+{
+	SetWindowClassesDirty(WC_COMPANY);
+	SetWindowClassesDirty(WC_COMPANY_INFRASTRUCTURE);
+}
+
 struct BuyCompanyWindow : Window {
 	BuyCompanyWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
 	{