Fix topics dropdown (#10167)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

web_src/js/index.js

@@ -3329,7 +3329,7 @@ function initTopicbar() {
       label: 'ui small label'
     },
     apiSettings: {
-      url: `${suburl}/api/v1/topics/search?q={encodeURIComponent(query)}`,
+      url: `${suburl}/api/v1/topics/search?q={query}`,
       throttle: 500,
       cache: false,
       onResponse(res) {