Merge branch 'stable-3.8' into stable-3.9

* stable-3.8:
  Only show matching hashtags as suggests

Change-Id: Iea019a506d37c41fc56fc7481be9f7d5164f8b79
Release-Notes: skip
diff --git a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts
index 634fbf8..489af56 100644
--- a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts
@@ -1221,6 +1221,7 @@
           .flatMap(change => change.hashtags ?? [])
           .filter(isDefined)
           .filter(unique)
+          .filter(hashtag => hashtag.includes(input))
           .map(hashtag => {
             return {name: hashtag, value: hashtag};
           })