The future of `reactive`

[codyduong]

Discussion for reactive. Initially I wanted every prop accept reactive, but this might be overkill.

Instead in lieu maybe accept the following

• Clock.format
• Label.label
• Base.class

[codyduong]

On a further note, it would be best for values that are NonOptions, aka required fields only.

[codyduong]

Reactive still has issues on fields which are not regularly watched (ie. if it is not already constructed in a relm4 view! macro with watcher, it will be hard to watch the ArcMutex for updates. So it serves no purpose in custom widgets)