qml: set implicitHeight on InformationPage

Fixes the binding loop on the scrollView's contentHeight

Author: johnny9

src/qml/controls/InformationPage.qml

@@ -9,6 +9,7 @@ import org.bitcoincore.qt 1.0
 
 Page {
     id: root
+    implicitHeight: information.height + continueButton.height + buttonMargin
     property alias bannerItem: banner_loader.sourceComponent
     property alias detailItem: detail_loader.sourceComponent
     property alias loadedDetailItem: detail_loader.item