Hide background detect settings in an accordion

Feedback from clinicians is that this tab was too busy. This commit hides all but the two essential buttons.

webapp/src/components/tabContentComponents/backgroundDetectComponents/paneBackgroundDetect.vue

@@ -4,15 +4,10 @@
       The background detect Thing seems to be missing or incompatible.
     </div>
     <div v-show="backendOK">
-      <div class="uk-margin">
+      <ul uk-accordion="multiple: true">
-        <taskSubmitter
+          <li>
-          :submit-url="setBackgroundUri"
+            <a class="uk-accordion-title" href="#">Settings</a>
-          submit-label="Set background"
+            <div class="uk-accordion-content">
-          :can-terminate="false"
-          :poll-interval="0.1"
-          @response="alertBackgroundSet"
-        />
-      </div>
               <div class="uk-margin">
                 <propertyControl
                   thing-name="background_detect"
@@ -37,10 +32,22 @@
                   @error="backgroundDetectError"
                 />
               </div>
+            </div>
+          </li>
+        </ul>
+      <div class="uk-margin">
+        <taskSubmitter
+          :submit-url="setBackgroundUri"
+          submit-label="Set background"
+          :can-terminate="false"
+          :poll-interval="0.1"
+          @response="alertBackgroundSet"
+        />
+      </div>
       <div class="uk-margin">
         <taskSubmitter
           :submit-url="labelImageUri"
-          submit-label="Label current image"
+          submit-label="Check current image"
           :can-terminate="false"
           :poll-interval="0.1"
           @response="alertImageLabel"