Disable horizontal scrollbar

The layout of the plugin/material cards should take care
of the text and rendering. The dimensions of these cards
therefor should not require a horizontal scrollbar

plugins/Marketplace/resources/qml/Plugins.qml

@@ -9,6 +9,7 @@ import UM 1.4 as UM
 ScrollView
 {
     clip: true
+    ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
 
     ListView
     {
@@ -170,4 +171,4 @@ ScrollView
             }
         }
     }
-}
+}