fix #950,bound dock win settings height

--dont enable height for dock settings that is
higher than the screen resolution height or one
that isnt shown correctly.

shell/package/contents/configuration/BehaviorConfig.qml

@@ -34,7 +34,10 @@ import "../controls" as ExtraControls
 PlasmaComponents.Page {
     Layout.maximumWidth: content.width + content.Layout.leftMargin * 2
     //fix the height binding loop when showing the configuration window
-    Layout.maximumHeight: 28*theme.mSize(theme.defaultFont).height + units.smallSpacing * 2
+    Layout.maximumHeight: Math.min(28*theme.mSize(theme.defaultFont).height + units.smallSpacing * 2, availableFreeHeight)
+
+    property int availableFreeHeight: dock.screenGeometry.height - dock.normalThickness - 2*units.largeSpacing
+                                      - header.height - headerSpacer.height - tabBar.height - actionButtons.height - 36
 
     property alias dockTypeSelection: _dockTypeSelection