Remove some subscription / reactivity / caching bugs and the unnecessary PatientLocations collection

Packages/worklist/client/components/tabContent/tabContent.html

@@ -1,5 +1,10 @@
 <template name="tabContent">
     <div role="tabpanel" class="tab-pane {{active}}" id="{{contentid}}">
-        {{ >loadingText }}
+        {{>loadingText}}
+        <div class="viewerContainer">
+            <!-- This extra viewerContainer div only exists to be destroyed when switching tabs.
+            It is a workaround because Meteor's onDestroyed and destruction handlers don't fire
+            when removing the actual template from the DOM.-->
+        </div>
     </div>
 </template>