Cosmetic enhancement: change plot icon in menus.

3dviewer: back to double (from float) in class S3D_MASTER for 3 members (m_MatScale, m_MatRotation, m_MatPosition) which are used in dialogs and r/w file functions, which expect double.
Using float create minor but unwanted issues in  r/w file functions.
S3D_MATERIAL: enable all color options: if a 3d shape has bad color parameters, the shape must be modified, not the 3d rendering.
The rendering now matches what we see in other vrml viewer like FreeCAD.
Some minor coding style fixes.

pcbnew/dialogs/dialog_edit_module_for_Modedit.cpp

@@ -161,9 +161,9 @@ void DIALOG_MODULE_MODULE_EDITOR::initModeditProperties()
     m_CostRot180Ctrl->SetValue( m_currentModule->GetPlacementCost180() );
 
     // Initialize 3D parameters
-    m_3D_Scale = new VERTEX_VALUE_CTRL( m_Panel3D, m_bSizerShapeScale );
-    m_3D_Offset = new VERTEX_VALUE_CTRL( m_Panel3D, m_bSizerShapeOffset );
-    m_3D_Rotation = new VERTEX_VALUE_CTRL( m_Panel3D, m_bSizerShapeRotation );
+    m_3D_Scale = new S3DPOINT_VALUE_CTRL( m_Panel3D, m_bSizerShapeScale );
+    m_3D_Offset = new S3DPOINT_VALUE_CTRL( m_Panel3D, m_bSizerShapeOffset );
+    m_3D_Rotation = new S3DPOINT_VALUE_CTRL( m_Panel3D, m_bSizerShapeRotation );
 
     // Initialize dialog relative to masks clearances
     m_NetClearanceUnits->SetLabel( GetAbbreviatedUnitsLabel( g_UserUnit ) );
@@ -222,8 +222,7 @@ void DIALOG_MODULE_MODULE_EDITOR::Transfert3DValuesToDisplay( S3D_MASTER * aStru
     }
     else
     {
-        S3D_VERTEX dummy_vertex;
-        dummy_vertex.x = dummy_vertex.y = dummy_vertex.z = 1.0;
+        S3DPOINT dummy_vertex( 1.0, 1.0, 1.0 );
         m_3D_Scale->SetValue( dummy_vertex );
     }
 }