Rename doubleclick to double_click

platform/javascript/display_server_javascript.cpp

@@ -215,14 +215,14 @@ EM_BOOL DisplayServerJavaScript::mouse_button_callback(int p_event_type, const E
 				display->last_click_ms = 0;
 				display->last_click_pos = Point2(-100, -100);
 				display->last_click_button_index = -1;
-				ev->set_doubleclick(true);
+				ev->set_double_click(true);
 			}
 
 		} else {
 			display->last_click_button_index = ev->get_button_index();
 		}
 
-		if (!ev->is_doubleclick()) {
+		if (!ev->is_double_click()) {
 			display->last_click_ms += diff;
 			display->last_click_pos = ev->get_position();
 		}