`discourse-common` was created in the past to share logic between the
'wizard' app and the main 'discourse' app. Since then, the wizard has
been consolidated into the main app, so the separation of
`discourse-common` is no longer useful.
This commit moves `discourse-common/(lib|utils)/*` into
`discourse/lib/*`, adds shims for the imports, and updates existing
uses in core.
This lays the groundwork for converting SelectKit subclasses to native class syntax. This commit is designed to be entirely backwards-compatible, so it should not affect any existing subclasses.
Of interest:
- Any properties which are designed to be overridden by subclasses are implemented using a local `@protoProp` decorator. That means they are applied to the prototype, so that they can be overridden in subclasses by both legacy `.extend()` prototype extensions, and by modern native-class fields.
- New class decorators are introduced: `@selectKitOptions` and `@pluginApiIdentifiers`. These are native class versions of the legacy `concatenatedProperties` system. This follows the pattern Ember has introduced for `@className`, `@classNameBindings`, etc.
Add the ability to modify a selectKit's content with `replaceContent`
Eg.
```
api.modifySelectKit("combo-box").replaceContent(() => {
return {
id: "foo",
name: "Foo",
};
});
```
will override existing content to only include the passed object
This reverts commit 20780a1eeed56b321daf18ee6bbfe681a51d1bf4.
* SECURITY: re-adds accidentally reverted commit:
03d26cd6: ensure embed_url contains valid http(s) uri
* when the merge commit e62a85cf was reverted, git chose the 2660c2e2 parent to land on
instead of the 03d26cd6 parent (which contains security fixes)
