Revert "[Azoth Murm] Desperate fix for crash on invalid QNetworkReply."

This reverts commit 12e0f2a6ae7d1574fff630fcc2f2d6f8c7ded6dc.
[Azoth Murm] Proper fix for segfault on double-polling.

Avoid issuing a poll request when already polling. Fixes:
 * Segfault on status change.
 * CPU hogging.
 * Logs enlarging.