This scenario has been forwarded to WebGrid development team. The report is filed under ASPNET-160.
I will keep you informed with any news I heard from the dev team regarding ASPNET-160.

Thank you and have a nice day.

Your requirement, to add a longer text to the presenter on Android, should match with the new presenter, which will be shipped in the next release, called Dialog Presenter. It allows you to add custom input controls to the dialog in addition to default action buttons.

For more detail, please kindly check the "Dialog Presenter" section in Crosslight Roadmap.

Sorry for the delay in sending this.

There might be push notification related code somewhere in the project. You can try to look for this code and remove it to avoid the warning.

However, as this warning doesn't prevent your app from being approved in the App store - if you can't find the code which cause this warning, you can leave it this way.

Please feel free to let us know whether this helps or not.

A window is represented by a class that implements IWindow interface which is the basic requirement of a window to be managed by the desktop manager. Examples of window controls that implement the IWindow interface are: UXWindowChrome, UXDialogBox and UXNavigationWindow.

A task bar is represented by a class that implements ITaskBar interface which is required for the desktop manager integration. You use UXDesktopDock control to implement the task bar interface that support desktop manager and window integration.

The most basic implementation to integrate a UXDesktop to a task bar such as UXDesktopDock is by specifying the target task bar instance to the TaskBar property of the UXDesktop. This can be done through element binding in XAML.

The following example shows a basic implementation of integration between the UXDesktop, UXWindow and UXDesktopDock.

<Intersoft:UXDesktop TaskBar="{Binding ElementName=desktopDock, Mode=OneWay}">
	<Intersoft:UXWindow x:Name="wndHome" Header="Welcome to My DesktopApp">
        <Grid>
            <TextBlock Text="Content for UXWindow1" />
        </Grid>
    </Intersoft:UXWindow>
</Intersoft:UXDesktop>
        
<Intersoft:UXDesktopDock x:Name="desktopDock">
	...
</Intersoft:UXDesktopDock>

From the above snippet code, one UXDesktop may only use one task bar (please correct me if I'm wrong). Could you please let me know why would you need to link 2 UXDesktopDock to 1 UXDesktop?

can we have two header rows in a grid?

Yes, you can utilize the ColumnSet feature to have two header rows in a grid. For example: following snippet code will create two header rows in WebGrid based on the grid's layout that you post on March 5, 2015.

<ISWebGrid:WebGrid ID="WebGrid1" runat="server" ...>
    <RootTable DataKeyField="CustomerID" RowLayout="ColumnSet">
        <Columns>
            <ISWebGrid:WebGridColumn Caption="Numeric Value" DataMember="CustomerID" Name="CustomerID"
                Width="100px">
            </ISWebGrid:WebGridColumn>
            <ISWebGrid:WebGridColumn Caption="Alphabetical Value" DataMember="CompanyName" Name="CompanyName"
                Width="100px">
            </ISWebGrid:WebGridColumn>
            <ISWebGrid:WebGridColumn Caption="Numeric Value" DataMember="ContactName" Name="ContactName"
                Width="100px">
            </ISWebGrid:WebGridColumn>
            <ISWebGrid:WebGridColumn Caption="Numeric Value" DataMember="ContactTitle" Name="ContactTitle"
                Width="100px">
            </ISWebGrid:WebGridColumn>
        </Columns>
        <ColumnSets>
            <ISWebGrid:WebGridColumnSet Caption="SI. No" ColumnCount="1" Name="ColumnSet0" Width="100px">
                <Layout>
                    <ISWebGrid:WebGridRowLayout ColumnMember="[set your SI.No column member in here]" />
                </Layout>
            </ISWebGrid:WebGridColumnSet>
            <ISWebGrid:WebGridColumnSet Caption="Name" ColumnCount="1" Name="ColumnSet1" Width="100px">
                <Layout>
                    <ISWebGrid:WebGridRowLayout ColumnMember="[set your Name column member in here]" />
                </Layout>
            </ISWebGrid:WebGridColumnSet>
            <ISWebGrid:WebGridColumnSet Caption="Mob. No." ColumnCount="1" Name="ColumnSet2" Width="100px">
                <Layout>
                    <ISWebGrid:WebGridRowLayout ColumnMember="[set your Mob.No column member in here]" />
                </Layout>
            </ISWebGrid:WebGridColumnSet>
            <ISWebGrid:WebGridColumnSet Caption="ID Mo." ColumnCount="1" Name="ColumnSet3" Width="100px">
                <Layout>
                    <ISWebGrid:WebGridRowLayout ColumnMember="[set your Id.Mo column member in here]" />
                </Layout>
            </ISWebGrid:WebGridColumnSet>
        </ColumnSets>
        <ColumnSetSettings RowCount="1" ShowHeaders="Yes" />
    </RootTable>
</ISWebGrid:WebGrid>

Result:

Hope this helps.