Show observer query's OS compatibility (#4140)

changes/issue-4095-observer-view-compatibility

@@ -0,0 +1 @@
+* An observer can view a query's operating system compatibility

frontend/components/FleetAce/FleetAce.tsx

@@ -80,6 +80,10 @@ const FleetAce = ({
       [`${baseClass}__label--with-action`]: !!labelActionComponent,
     });
 
+    if (!label) {
+      return <></>;
+    }
+
     return (
       <div className={labelClassName}>
         <p>{labelText}</p>

frontend/pages/queries/QueryPage/components/QueryForm/QueryForm.tsx

@@ -351,6 +351,9 @@ const QueryForm = ({
           readOnly
         />
       )}
+      <span className={`${baseClass}__platform-compatibility`}>
+        {renderPlatformCompatibility()}
+      </span>
       {renderLiveQueryWarning()}
       {lastEditedQueryObserverCanRun && (
         <div