Notice and GlobalNotice

[renintw]

Currently, we have two types of notices: Notice and GlobalNotice.

A Notice is a prompt box that appears in various positions within each component. It could be an error notice, or a warning, info, success notice, etc.

GlobalNotice, on the other hand, is a black prompt box that pops up in a fixed position in the top right corner. Its message is set through setGlobalNotice.

We could consider consolidating these two to enhance readability.

[iandunn]

They seem to serve different purposes to me, but maybe that's just mainly CSS?

GlobalNotice is more like a Snackbar, so maybe we should use that component instead? Offhand I don't remember why we wrote a custom one.

[renintw]

Yeah, that's a good point. Originally, I thought there were probably some reasons for naming it as GlobalNotice so I figured it could reduce confusion by merging the two components. But it looks like we could directly replace GlobalNotice with Snackbar, or these GlobalNotice and Notice naming would be likely to cause some misunderstanding for someone new to the code or when we come back to look at the code after a while.