Merge branch 'Mailu:master' into test-ci-parallel

.github/workflows/CI.yml

@@ -1,5 +1,10 @@
 name: CI
 on:
+#NOTE: The workflow will ONLY trigger when the branch actually contains the CI.yml workflow file.
+#So if a PR is tested on STAGING/TESTING branch by BORS without this file present, then the workflow
+#will NOT trigger. For these situations, manually start the workflow. This should be resolved once all
+#old PRs without the CI.yml workflow file have been merged.
+  workflow_dispatch:
   push:
     branches:
       - staging