Improve security for DLL loading

Use "/DEPENDENTLOADFLAG:0x800" to limite module search path to the %windows%\system32 directory.

Fix notepad-plus-plus#13964, close notepad-plus-plus#16762

Author: ozone10

PowerEditor/visual.net/notepadPlus.Cpp.props

@@ -50,6 +50,7 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Windows</SubSystem>
       <AdditionalLibraryDirectories>..\..\scintilla\bin;$(IntDir);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalOptions>/DEPENDENTLOADFLAG:0x800 %(AdditionalOptions)</AdditionalOptions>
     </Link>
     <Manifest>
       <AdditionalManifestFiles>..\src\dpiAware.manifest;%(AdditionalManifestFiles)</AdditionalManifestFiles>