David Taylor 056898c55f
DEV: Prepare modal implementation for Ember upgrade ()
- Skip rendering DModalLegacy when running Ember 5
- Move named outlet inside the DModalLegacy component file
- Exclude that DModalLegacy template from the build when running Ember 5
- Skip LegacySupport version of modal service when running Ember 5
- Add error popup for legacy modals when running Ember 5

Extracted from https://github.com/discourse/discourse/pull/21720. This is a no-op under our current Ember 3.28 version.
2023-11-27 13:50:25 +00:00
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