WiimoteReal: Call Update() less often

This moves back the WiimoteScanner:Update() call to where it originally
was, since according to a comment it is intended to be called only when
"when not looking for more Wiimotes", and calling it too often causes
the Bluetooth module to be loaded/unloaded a lot of times.

Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp

@@ -472,7 +472,6 @@ void WiimoteScanner::ThreadFunc()
   {
     m_scan_mode_changed_event.WaitFor(std::chrono::milliseconds(500));
 
-    Update();  // Does stuff needed to detect disconnects on Windows
     CheckForDisconnectedWiimotes();
 
     if (m_scan_mode.load() == WiimoteScanMode::DO_NOT_SCAN)
@@ -490,6 +489,10 @@ void WiimoteScanner::ThreadFunc()
           TryToConnectBalanceBoard(found_board);
       }
     }
+    else
+    {
+      Update();  // Does stuff needed to detect disconnects on Windows
+    }
 
     if (m_scan_mode.load() == WiimoteScanMode::SCAN_ONCE)
       m_scan_mode.store(WiimoteScanMode::DO_NOT_SCAN);