title: RadGrid Export To Excel Layout Issue
body: <p>So I have a Grid with a MasterTableView that contains a DetailTable, and that DetailTable contains a DetailTable.  Everything is correct as far as layout indentation when it renders to the screen and when I export to pdf. But the problem is when I try to export to excel. When the spreadsheet opens the MasterTableView item is say 7 columns wide. The first DetailTable item is say 5 columns wide, and the second DetailTable items are 3 columns wide. And they appear like they are center aligned so it looks like an upside down pyramid.  My client does not like this and I have tried for hours now to figure out how to make the item indentations look like they do in the pdf and screen but with no luck.  Is there a setting or something to make the excel render correctly or is this a bug.  Below will be my grid markup, and I'll attach an image of the spreadsheet so you can see what it looks like.  Thanks for any help in this issue.</p>
  
  <pre><code>    &lt;telerik:RadGrid ID="RadGrid1" runat="server" ShowFooter="false" AutoGenerateColumns="false"
      AllowPaging="true" AllowSorting="false" CellSpacing="5" AllowFilteringByColumn="false"&gt;
      &lt;ExportSettings HideStructureColumns="true" ExportOnlyData="true" IgnorePaging="true" OpenInNewWindow="true"&gt;
          &lt;Pdf AllowAdd="false" AllowCopy="true" AllowModify="false" AllowPrinting="true" PageTitle="ESign Sent vs Sold"
              Title="ESign Sent vs Sold" PaperSize="A4" PageWidth="260mm" /&gt;
          &lt;Excel Format="Html" /&gt;
      &lt;/ExportSettings&gt;
  
      &lt;ClientSettings AllowExpandCollapse="true"&gt;
          &lt;Selecting AllowRowSelect="true" /&gt;
      &lt;/ClientSettings&gt;
  
      &lt;MasterTableView DataKeyNames="ParentID, ID" Name="DivisionTable" HierarchyLoadMode="Client" HierarchyDefaultExpanded="false" ClientDataKeyNames="ParentID, ID"&gt;
          &lt;HeaderStyle Font-Bold="true" HorizontalAlign="Left" Wrap="false" /&gt;
          &lt;ItemStyle Wrap="false" VerticalAlign="Middle" HorizontalAlign="Left" /&gt;
          &lt;AlternatingItemStyle Wrap="false" VerticalAlign="Middle" HorizontalAlign="Left" /&gt;
          &lt;FooterStyle Wrap="false" /&gt;
  
          &lt;DetailTables&gt;
          &lt;telerik:GridTableView Name="RegionTable" DataKeyNames="ParentID, ID" ClientDataKeyNames="ParentID, ID" HierarchyLoadMode="Client" Width="100%" HierarchyDefaultExpanded="false" &gt;
              &lt;DetailTables&gt;
                  &lt;telerik:GridTableView Name="BranchTable" DataKeyNames="ParentID, ID" ClientDataKeyNames="ParentID, ID" HierarchyLoadMode="Client" Width="100%" HierarchyDefaultExpanded="false" &gt;
                      &lt;Columns&gt;
                          &lt;telerik:GridTemplateColumn UniqueName="Filler" ItemStyle-Width="25px" HeaderStyle-Width="25px"&gt;
                              &lt;ItemTemplate&gt;
                                  &lt;span&gt;&amp;nbsp;&lt;/span&gt;
                              &lt;/ItemTemplate&gt;
                          &lt;/telerik:GridTemplateColumn&gt;
                          &lt;telerik:GridBoundColumn UniqueName="Text" DataField="Text" SortExpression="Text" HeaderText="Branch" ItemStyle-Width="300px" HeaderStyle-Width="300px" /&gt;
                          &lt;telerik:GridBoundColumn UniqueName="SentCount" DataField="SentCount" SortExpression="SentCount" HeaderText="ESign Sent" ItemStyle-Width="150px" HeaderStyle-Width="150px" /&gt;
                          &lt;telerik:GridBoundColumn UniqueName="SoldCount" DataField="SoldCount" SortExpression="SoldCount" HeaderText="Sold w/ ESign"  /&gt;
                      &lt;/Columns&gt;
                  &lt;/telerik:GridTableView&gt;
              &lt;/DetailTables&gt;
  
              &lt;Columns&gt;
                  &lt;telerik:GridBoundColumn UniqueName="Text" DataField="Text" SortExpression="Text" HeaderText="Region" ItemStyle-Width="300px" HeaderStyle-Width="300px" /&gt;
                  &lt;telerik:GridBoundColumn UniqueName="SentCount" DataField="SentCount" SortExpression="SentCount" HeaderText="ESign Sent" ItemStyle-Width="150px" HeaderStyle-Width="150px" /&gt;
                  &lt;telerik:GridBoundColumn UniqueName="SoldCount" DataField="SoldCount" SortExpression="SoldCount" HeaderText="Sold w/ ESign"  /&gt;
              &lt;/Columns&gt;
          &lt;/telerik:GridTableView&gt;
          &lt;/DetailTables&gt;
  
          &lt;Columns&gt;
                  &lt;telerik:GridBoundColumn UniqueName="Text" DataField="Text" SortExpression="Text" HeaderText="Division" ItemStyle-Width="300px" HeaderStyle-Width="300px" /&gt;
                  &lt;telerik:GridBoundColumn UniqueName="SentCount" DataField="SentCount" SortExpression="SentCount" HeaderText="ESign Sent" ItemStyle-Width="150px" HeaderStyle-Width="150px"   /&gt;
                  &lt;telerik:GridBoundColumn UniqueName="SoldCount" DataField="SoldCount" SortExpression="SoldCount" HeaderText="Sold w/ ESign"  /&gt;
          &lt;/Columns&gt;
  
      &lt;/MasterTableView&gt;
  &lt;/telerik:RadGrid&gt;
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/egFqP.png" alt="enter image description here"></p>