Added WebBrowser overlay demo

Demos/NativeControls/WebBrowserOverlay/ReadMe.md

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+# Web Browser Overlay Demo
+
+## Description
+
+Demonstrates using native controls that show over the top of `TWebBrowser`
+
+Prompted by a question on Delphi Praxis, [here](https://en.delphipraxis.net/topic/12144-mouse-cursor/?do=findComment&comment=95938).
+
+This demo has a single `TNativeImage` control with a mouse-pointer like image, which is overlaid on a `TWebBrowser`.
+
+Please refer to the [native controls documentation](https://github.com/DelphiWorlds/Kastri/blob/master/Controls/NativeControls.md) for details about the controls themselves, **including installation**

Demos/NativeControls/WebBrowserOverlay/Unit1.fmx

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+object Form1: TForm1
+  Left = 0
+  Top = 0
+  Caption = 'Form1'
+  ClientHeight = 480
+  ClientWidth = 640
+  FormFactor.Width = 320
+  FormFactor.Height = 480
+  FormFactor.Devices = [Desktop]
+  OnCreate = FormCreate
+  DesignerMasterStyle = 0
+  object WebBrowser1: TWebBrowser
+    Align = Client
+    Size.Width = 640.000000000000000000
+    Size.Height = 381.000000000000000000
+    Size.PlatformDefault = False
+    WindowsEngine = IEOnly
+  end
+  object TopLayout: TLayout
+    Align = Top
+    Padding.Left = 6.000000000000000000
+    Padding.Top = 4.000000000000000000
+    Padding.Right = 6.000000000000000000
+    Padding.Bottom = 4.000000000000000000
+    Size.Width = 640.000000000000000000
+    Size.Height = 49.000000000000000000
+    Size.PlatformDefault = False
+    TabOrder = 0
+    object GoButton: TButton
+      Align = Right
+      Margins.Left = 12.000000000000000000
+      Position.X = 535.000000000000000000
+      Position.Y = 4.000000000000000000
+      Size.Width = 99.000000000000000000
+      Size.Height = 41.000000000000000000
+      Size.PlatformDefault = False
+      TabOrder = 0
+      Text = 'Go'
+      TextSettings.Trimming = None
+      OnClick = GoButtonClick
+    end
+    object URLEdit: TEdit
+      Touch.InteractiveGestures = [LongTap, DoubleTap]
+      Align = VertCenter
+      TabOrder = 1
+      Text = 'https://fissedesign.com.au/'
+      Position.X = 6.000000000000000000
+      Position.Y = 10.000000000000000000
+      Size.Width = 517.000000000000000000
+      Size.Height = 28.000000000000000000
+      Size.PlatformDefault = False
+    end
+  end
+  object Memo1: TMemo
+    Touch.InteractiveGestures = [Pan, LongTap, DoubleTap]
+    DataDetectorTypes = []
+    Align = Bottom
+    Position.Y = 430.000000000000000000
+    Size.Width = 640.000000000000000000
+    Size.Height = 50.000000000000000000
+    Size.PlatformDefault = False
+    TabOrder = 2
+    Viewport.Width = 636.000000000000000000
+    Viewport.Height = 46.000000000000000000
+  end
+  object NativeImage1: TNativeImage
+    BackgroundColor = claNull
+    Image.PNG = {
+      89504E470D0A1A0A0000000D4948445200000040000000400806000000AA6971
+      DE0000000473424954080808087C0864880000028849444154789CED993F6814
+      5110873F93F80741228722C4C24A14045114AB4B65C0468514A2A5556C44ED6C
+      528895D8A5D3801609A40858599A4A5B2D0249142B110441103568A2DEE52C66
+      97B7B7BBB9DDF3DE7B7BBB371F2C2CB7EFDEFE6676DECC9B5D50144551144551
+      144551068F614BF38C0017800D60DDD29CA5E23ED002FE02CF80F3C08E421579
+      E621E280E8F116B8058C16A8CB1BC7802D924E68214BE21170B230759E788131
+      FA25920FE2CE78055C037615A4D1299318436790D09F02D6483AE233F0003852
+      8852470C031F10037F00FB82DF878009601168D0EE8826123997A848D29CC618
+      7723E5FA61E01EF0856454BC07EE02351F425D7110D8440C5AE9306E377085F6
+      BC111E1BC01C70CAA952872C608CA9E7187F06780CFC24E98CD7481ED9E344A9
+      23EA180316BAF85FA592E61B44F81F60ACCBFF5622694E61444FF7304F6993E6
+      5EE02B22F413B0B3C7F94A9934673022272DCE7B16784AFA4EF389C5FBF44CB4
+      3F58B23C770DE9409BB43BE0BBE5FBF44C18B25BC0710BF3D591704F7BFAABD8
+      8D342BC4FB83FF212C8FCB248DDE44AAC5047D5A15B6EB0FF2D06983F40EA900
+      072C6A7546567F10E73212CEDB65FB3CBBCBBEE210F01B316239636C0DF84572
+      6DDFA64FEB7D5EF2F6077722E39E03E3EEA5F9216F7FB08209F7523FF134B2FA
+      83718C93E63CEAF246567F304FBE65525A3AF507FB31E56E0D8F357DC8D78D90
+      EC3E1F9C8F011723D7AE230E02A9FD2D7FB2FC7294F4FEA0D2C92FCE1266AD9F
+      A0E0E467EBE36837AC035783F30692F0C2AF4637818F0568F2CA0862640BF886
+      E9EC568B10E33309863480D9E07C14F3C677367D7835897E3F1898E41727DA1F
+      5472E797C539E4955633381F484E0787A2288AA2288AA2288AA278E41FEA34F9
+      1B680D25BD0000000049454E44AE426082}
+    Position.X = 134.000000000000000000
+    Position.Y = 82.000000000000000000
+    Size.Width = 71.000000000000000000
+    Size.Height = 62.000000000000000000
+    Size.PlatformDefault = False
+    TextSettings.Font.StyleExt = {00070000000000000004000000}
+    TextSettings.FontColor = claWhite
+    TextSettings.HorzAlign = Center
+  end
+end

Demos/NativeControls/WebBrowserOverlay/Unit1.pas

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+unit Unit1;
+
+interface
+
+uses
+  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
+  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.Controls.Presentation, DW.NativeShape, FMX.WebBrowser, FMX.Edit, FMX.StdCtrls,
+  FMX.Layouts, DW.NativeImage, FMX.Memo.Types, FMX.ScrollBox, FMX.Memo, DW.NativeSlider;
+
+type
+  TForm1 = class(TForm)
+    WebBrowser1: TWebBrowser;
+    TopLayout: TLayout;
+    GoButton: TButton;
+    URLEdit: TEdit;
+    Memo1: TMemo;
+    NativeImage1: TNativeImage;
+    procedure FormCreate(Sender: TObject);
+    procedure GoButtonClick(Sender: TObject);
+  private
+    { Private declarations }
+  public
+    { Public declarations }
+  end;
+
+var
+  Form1: TForm1;
+
+implementation
+
+{$R *.fmx}
+
+procedure TForm1.FormCreate(Sender: TObject);
+begin
+  GoButtonClick(GoButton);
+end;
+
+procedure TForm1.GoButtonClick(Sender: TObject);
+begin
+  WebBrowser1.Navigate(URLEdit.Text);
+end;
+
+end.

Demos/NativeControls/WebBrowserOverlay/WBOverlay.dpr

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+program WBOverlay;
+
+uses
+  System.StartUpCopy,
+  FMX.Forms,
+  Unit1 in 'Unit1.pas' {Form1};
+
+{$R *.res}
+
+begin
+  Application.Initialize;
+  Application.CreateForm(TForm1, Form1);
+  Application.Run;
+end.