Enable DPI aware setting in Lazarus demos for Windows

Cleanup some useless code in Lazarus demos for Windows

demos/Lazarus_Windows/ToolBoxBrowser2/ToolBoxBrowser2.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/ToolBoxBrowser2/ToolBoxBrowser2.lpr

@@ -3,20 +3,14 @@ program ToolBoxBrowser2;
 {$MODE Delphi}
 
 uses
-  {$IFDEF DELPHI16_UP}
-  Vcl.Forms,
-  WinApi.Windows,
-  {$ELSE}
   Windows,
   Forms,
   LCLIntf, LCLType, LMessages, Interfaces,
-  {$ENDIF }
   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 $20}{$ENDIF}
 
 {$R *.res}
 

demos/Lazarus_Windows/ToolBoxBrowser2/uMainForm.lfm

@@ -12,9 +12,9 @@ object MainForm: TMainForm
   Font.Color = clWindowText
   Font.Height = -11
   Font.Name = 'Tahoma'
-  OnShow = FormShow
   Position = poScreenCenter
-  LCLVersion = '2.0.12.0'
+  LCLVersion = '4.0.0.4'
+  OnShow = FormShow
   object ButtonPnl: TPanel
     Left = 0
     Height = 37
@@ -25,6 +25,7 @@ object MainForm: TMainForm
     ClientHeight = 37
     ClientWidth = 357
     Enabled = False
+    ParentBackground = False
     TabOrder = 0
     object Edit1: TEdit
       Left = 6
@@ -40,8 +41,8 @@ object MainForm: TMainForm
       Top = 4
       Width = 51
       Caption = 'Open'
-      OnClick = Button1Click
       TabOrder = 1
+      OnClick = Button1Click
     end
   end
   object CEFWindowComponent1: TCEFWindowComponent

demos/Lazarus_Windows/ToolBoxBrowser2/uMainForm.pas

@@ -5,13 +5,8 @@ unit uMainForm;
 interface
 
 uses
-  {$IFDEF DELPHI16_UP}
-  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
-  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls, Vcl.ComCtrls,
-  {$ELSE}
   LCLIntf, LCLType, LMessages, Messages, SysUtils, Variants, Classes, Graphics,
   Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ComCtrls,
-  {$ENDIF}
   uCEFInterfaces, uCEFTypes, uCEFConstants, uCEFViewComponent,
   uCEFPanelComponent, uCEFWindowComponent,
   uCEFBrowserViewComponent, uCEFChromiumCore, uCEFChromium, uCEFViewsFrameworkEvents;