Leverage +LATEST in taskadd userscript.

This is cleaner than parsing the output of `task`.

misc/userscripts/taskadd

@@ -28,11 +28,8 @@
 msg="$(task add $title $@ 2>&1)"
 
 if [[ $? == 0 ]]; then
-    # scan the output for the new task number
-    num=$(echo $msg | sed -r 's/Created task ([0-9]+)\./\1/')
-
     # annotate the new task with the url, send the output back to the browser
-    task $num annotate "$QUTE_URL"
+    task +LATEST annotate "$QUTE_URL"
     echo "message-info '$msg'" >> $QUTE_FIFO
 else
     echo "message-error '$msg'" >> $QUTE_FIFO