Enable DPI aware setting in Lazarus demos for Windows

Cleanup some useless code in Lazarus demos for Windows

demos/Lazarus_Windows/EditorBrowser/EditorBrowser.dpr

@@ -1,31 +1,20 @@
 program EditorBrowser;
 
-{$IFDEF FPC}
-  {$MODE Delphi}
-{$ENDIF}
+{$MODE Delphi}
 
 {$I ..\..\..\source\cef.inc}
 
 uses
-  {$IFDEF DELPHI16_UP}
-  Vcl.Forms,
-  WinApi.Windows,
-  {$ELSE}
-{$IFnDEF FPC}
-{$ELSE}
-  Interfaces,
-{$ENDIF}
   Forms,
-  Windows,
-  {$ENDIF }
+  Windows, 
+  Interfaces,
   uCEFApplication,
   uEditorBrowser in 'uEditorBrowser.pas' {Form1};
 
 {.$R *.res}
 
-// CEF3 needs to set the LARGEADDRESSAWARE flag which allows 32-bit processes to use up to 3GB of RAM.
-// If you don't add this flag the rederer process will crash when you try to load large images.
-{$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}
 
@@ -35,9 +24,6 @@ begin
   if GlobalCEFApp.StartMainProcess then
     begin
       Application.Initialize;
-      {$IFDEF DELPHI11_UP}
-      Application.MainFormOnTaskbar := True;
-      {$ENDIF}
       Application.CreateForm(TForm1, Form1);
       Application.Run;
     end;

demos/Lazarus_Windows/EditorBrowser/EditorBrowser.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"/>