Add support to set the icon title using a widget

[RaphaelRevivor]

Hi,

I would like to request a feature, that is to support setting the icon title using a widget.
Use case:
I would like to add a countdown next to the icon, that changes according to the remaining time. Since the width of the numbers are different, using the current method:
// Sets the title for this tray icon.
setTitle(String title) → Future<void>
will cause the icon and the title to move constantly.
If I can set the title using a widget, then I can control the text to be constant width, that way it won't move.
Please also let me know if there is any other solution using the current method.

Thanks,
Raphael

---

你好，
我这边有一个需求，希望能够用一个widget来设置icon title。
用例：
我想在icon旁边加一个倒计时，显示当前计时剩余时间。由于各个数字的宽度不同，使用当前的函数：
// Sets the title for this tray icon.
setTitle(String title) → Future<void>
会导致icon和title一直不停的移动（抖动）。
如果能够用一个widget来设置icon title，那我就可以限定这个widget的宽度，那它就不会抖动了。
此外，如果用现有函数已经有成熟的解决方案，也欢迎告诉我！

感谢！
Raphael