Information callout not an alias

Callouts - Obsidian Help mentions that the tip callout has aliases hint and important.

While working on some theme, I noticed that the base app.css has a CSS definition for important, separate from tip/hint. This includes having its own dedicated --callout-important that can be styled in a different colour than tip/hint (--callout-tip) along with a potentially different icon.

They do, in the default theme, share the same styling, but that’s not guaranteed when using other themes (nor maybe the default theme in the future).

moved to appropriate section