Make package detail page scroll if details are too long

Some plug-ins could have very long descriptions now. We show all of it, but that could go off the screen in theory.

This makes the content scrollable if it goes off the screen.

Contributes to issue CURA-8565.

plugins/Marketplace/resources/qml/PackageDetails.qml

@@ -67,20 +67,30 @@ Item
         }
         color: UM.Theme.getColor("detail_background")
 
-        PackageCard
+        ScrollView
         {
-            anchors
-            {
-                left: parent.left
-                leftMargin: UM.Theme.getSize("default_margin").width
-                right: parent.right
-                rightMargin: anchors.leftMargin
-                top: parent.top
-                topMargin: UM.Theme.getSize("default_margin").height
-            }
+            anchors.fill: parent
 
-            packageData: detailPage.packageData
-            expanded: true
+            clip: true //Need to clip, not for the bottom (which is off the window) but for the top (which would overlap the header).
+            ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
+            contentHeight: expandedPackageCard.height + UM.Theme.getSize("default_margin").height * 2
+
+            PackageCard
+            {
+                id: expandedPackageCard
+                anchors
+                {
+                    left: parent.left
+                    leftMargin: UM.Theme.getSize("default_margin").width
+                    right: parent.right
+                    rightMargin: anchors.leftMargin
+                    top: parent.top
+                    topMargin: UM.Theme.getSize("default_margin").height
+                }
+
+                packageData: detailPage.packageData
+                expanded: true
+            }
         }
     }
 }