Enable DPI aware setting in Lazarus demos for Windows

Cleanup some useless code in Lazarus demos for Windows

demos/Lazarus_Windows/FullScreenBrowser/FullScreenBrowser.lpi

@@ -16,6 +16,9 @@
       <UseAppBundle Value="False"/>
       <ResourceType Value="res"/>
       <UseXPManifest Value="True"/>
+      <XPManifest>
+        <DpiAware Value="True/PM_V2"/>
+      </XPManifest>
     </General>
     <BuildModes Count="1">
       <Item1 Name="Default" Default="True"/>

demos/Lazarus_Windows/FullScreenBrowser/FullScreenBrowser.lpr

@@ -5,19 +5,14 @@ program FullScreenBrowser;
 {$I ..\..\..\source\cef.inc}
 
 uses
-  {$IFDEF DELPHI16_UP}
-  Vcl.Forms,
-  WinApi.Windows,
-  {$ELSE}
-  Forms, Windows,
-  LCLIntf, LCLType, LMessages, Interfaces,
-  {$ENDIF }
+  Forms,
+  Windows,
+  Interfaces,
   uCEFApplication,
   uMainForm in 'uMainForm.pas' {MainForm};
 
-{.$R *.res}
-
-{$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE}
+// CEF needs to set the LARGEADDRESSAWARE ($20) flag which allows 32-bit processes to use up to 3GB of RAM.
+{$IFDEF WIN32}{$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE}{$ENDIF}
 
 {$R *.res}
 

demos/Lazarus_Windows/FullScreenBrowser/uMainForm.lfm

@@ -6,16 +6,17 @@ object MainForm: TMainForm
   BorderIcons = []
   BorderStyle = bsNone
   Caption = 'MainForm'
-  ClientHeight = 728
+  ClientHeight = 751
   ClientWidth = 1396
   Color = clBtnFace
   Font.Color = clWindowText
   Font.Height = -11
   Font.Name = 'Tahoma'
+  LCLVersion = '4.0.0.4'
+  WindowState = wsMaximized
   OnCloseQuery = FormCloseQuery
   OnCreate = FormCreate
   OnShow = FormShow
-  WindowState = wsMaximized
   object CEFWindowParent1: TCEFWindowParent
     Left = 0
     Height = 728

demos/Lazarus_Windows/FullScreenBrowser/uMainForm.pas

@@ -5,14 +5,8 @@
 interface
 
 uses
-  {$IFDEF DELPHI16_UP}
-  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
-  Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
-  System.UITypes,
-  {$ELSE}
   LCLIntf, LCLType, LMessages, Messages, SysUtils, Variants, Classes, Graphics,
   Controls, Forms, Dialogs, ExtCtrls,
-  {$ENDIF}
   uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFTypes, uCEFConstants,
   uCEFWinControl;