Set line chart amount of history spinbox max to actual maximum value

Like the range SpinBoxes, set the max to the actual maximum SpinBox can
handle since we don't actually have a maximum here.

faces/facepackages/linechart/contents/ui/Config.qml

@@ -105,7 +105,7 @@ Kirigami.FormLayout {
         id: historySpin
         editable: true
         from: 0
-        to: 999999999
+        to: Math.pow(2, 31) - 1
         Kirigami.FormData.label: i18n("Amount of History to Keep:")
 
         textFromValue: function(value, locale) {