Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `Gemfile.lock`: not a real conflict, upstream update too close
  to a glitch-soc-specific dependency

app/javascript/styles/mastodon/components.scss

@@ -3227,6 +3227,31 @@ a.status-card.compact:hover {
   border-bottom: 1px solid lighten($ui-base-color, 8%);
 }
 
+.timeline-hint {
+  text-align: center;
+  color: $darker-text-color;
+  padding: 15px;
+  box-sizing: border-box;
+  width: 100%;
+  cursor: default;
+
+  strong {
+    font-weight: 500;
+  }
+
+  a {
+    color: lighten($ui-highlight-color, 8%);
+    text-decoration: none;
+
+    &:hover,
+    &:focus,
+    &:active {
+      text-decoration: underline;
+      color: lighten($ui-highlight-color, 12%);
+    }
+  }
+}
+
 .regeneration-indicator {
   text-align: center;
   font-size: 16px;