Fix trending hashtags spacing in single-column mode

app/javascript/flavours/glitch/styles/components/index.scss

@@ -847,7 +847,8 @@
 }
 
 .getting-started__wrapper,
-.getting_started {
+.getting_started,
+.flex-spacer {
   background: $ui-base-color;
 }
 
@@ -856,6 +857,10 @@
   overflow-y: auto;
 }
 
+.flex-spacer {
+  flex: 1 1 auto;
+}
+
 .getting-started {
   background: $ui-base-color;
   flex: 1 0 auto;