Enable DPI aware setting in Lazarus demos for Windows

Cleanup some useless code in Lazarus demos for Windows

demos/Lazarus_Windows/MobileBrowser/MobileBrowser.lpi

@@ -15,6 +15,9 @@
       <UseAppBundle Value="False"/>
       <ResourceType Value="res"/>
       <UseXPManifest Value="True"/>
+      <XPManifest>
+        <DpiAware Value="True/PM_V2"/>
+      </XPManifest>
     </General>
     <BuildModes>
       <Item Name="Default" Default="True"/>
@@ -46,10 +49,6 @@
         <HasResources Value="True"/>
         <ResourceBaseClass Value="Form"/>
       </Unit>
-      <Unit>
-        <Filename Value="..\..\..\source\uCEFApplication.pas"/>
-        <IsPartOfProject Value="True"/>
-      </Unit>
     </Units>
   </ProjectOptions>
   <CompilerOptions>
@@ -60,7 +59,6 @@
     </Target>
     <SearchPaths>
       <IncludeFiles Value="..\..\..\source;$(ProjOutDir)"/>
-      <OtherUnitFiles Value="..\..\..\source"/>
       <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
     </SearchPaths>
     <Parsing>

demos/Lazarus_Windows/MobileBrowser/MobileBrowser.lpr

@@ -5,16 +5,14 @@ program MobileBrowser;
 {$I ..\..\..\source\cef.inc}
 
 uses
-  Forms, Interfaces,
+  Forms,
+  Interfaces,
   Windows,
-  uCEFApplication, uCEFConstants,
+  uCEFApplication,
   uMobileBrowser in 'uMobileBrowser.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}
 
@@ -39,9 +37,6 @@ begin
   if GlobalCEFApp.StartMainProcess then
     begin
       Application.Initialize;
-      {$IFDEF DELPHI11_UP}
-      Application.MainFormOnTaskbar := True;
-      {$ENDIF}
       Application.CreateForm(TForm1, Form1);
       Application.Run;
     end;