Don't poll gamepad input when the GUI is not focused/visible

app/gui/PcView.qml

@@ -7,7 +7,6 @@ import ComputerModel 1.0
 import ComputerManager 1.0
 import StreamingPreferences 1.0
 import SystemProperties 1.0
-import SdlGamepadKeyNavigation 1.0
 
 CenteredGridView {
     property ComputerModel computerModel : createModel()
@@ -34,11 +33,6 @@ CenteredGridView {
         // Setup signals on CM
         ComputerManager.computerAddCompleted.connect(addComplete)
 
-        // This is a bit of a hack to do this here as opposed to main.qml, but
-        // we need it enabled before calling getConnectedGamepads() and PcView
-        // is never destroyed, so it should be okay.
-        SdlGamepadKeyNavigation.enable()
-
         // Highlight the first item if a gamepad is connected
         if (currentIndex == -1 && SdlGamepadKeyNavigation.getConnectedGamepads() > 0) {
             currentIndex = 0