Issue 206 - Improve automember rebuild confirmation message

Highlight that the rebuild task is very expensive and that it typically
only needs to done once, and not regularly. Also since the task can run
for a very long time a "info" alert is added at the start of the task
stating that the task is being started and it may take a long time to
complete.

relates: freeipa#206

Signed-off-by: Mark Reynolds <[email protected]>

src/pages/ActiveUsers/ActiveUsers.tsx

@@ -282,6 +282,15 @@ const ActiveUsers = () => {
       params: [[], paramArgs],
     };
 
+    // Task can potentially run for a very long time, give feed back that we
+    // at least started the task
+    alerts.addAlert(
+      "rebuild-automember-start",
+      "Starting automember rebuild membership task (this may take a long " +
+        "time to complete) ...",
+      "info"
+    );
+
     executeCommand(automemberPayload).then((result) => {
       if ("data" in result) {
         const automemberError = result.data.error as
@@ -344,7 +353,11 @@ const ActiveUsers = () => {
       id: "question-text",
       pfComponent: (
         <TextLayout component="p">
-          Are you sure you want to rebuild auto membership?
+          <b>Warning</b> In case of a high number of users, hosts or groups, the
+          rebuild task may require high CPU usage. This can severely impact
+          server performance. Typically this only needs to be done once after
+          importing raw data into the server. Are you sure you want to rebuild
+          the auto memberships?
         </TextLayout>
       ),
     },