- create tray top, bottom, left e right

- gestiti panel con Visibility
- gestiti elementi grafici in ProjectV con ItemsControl
- eliminato pannello Printing3d
- aggiunta gestione Plugin
- verifica bit per Plugin

WinFormPluginControl/WinFormPluginControlV.xaml

@@ -0,0 +1,10 @@
+<Grid x:Class="WinFormPluginControlV"
+           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+           DockPanel.Dock="{Binding DockSide}">
+
+   <!--ContentControl che ospita la scena restituita sotto forma di WindowsFormsHost-->
+   <!--<ContentControl Content="{Binding WinFormUserControlHost}"/>-->
+   <WindowsFormsHost Name="WinFormHost"/>
+
+</Grid>