Fix marketplace button not directing to the web marketplace

We generally disabled the clicks in the mouseArea of the tooltips.
In this case though it should still accept the left click since it acts as a button.

CURA-8125

plugins/Toolbox/resources/qml/components/ToolboxHeader.qml

@@ -90,6 +90,7 @@ Item
             rightMargin: UM.Theme.getSize("default_margin").width
             verticalCenter: parent.verticalCenter
         }
+        acceptedButtons: Qt.LeftButton
         onClicked: Qt.openUrlExternally(toolbox.getWebMarketplaceUrl("plugins"))
         UM.RecolorImage
         {