VS: Fix MANIFESTUAC link flag map to .vcxproj elements

Add special parsing of the flags given in `/MANIFESTUAC:"..."` in order
to map them correctly to `.vcxproj` elements.

Keep the old incorrect flag table entries for `uiAccess` and `level`
flags for compatibility even though they do not really exist.

Fixes: #16563

Source/cmVisualStudio10TargetGenerator.cxx

@@ -3261,6 +3261,7 @@ bool cmVisualStudio10TargetGenerator::ComputeLinkOptions(
   }
 
   linkOptions.Parse(flags.c_str());
+  linkOptions.FixManifestUACFlags();
 
   if (this->MSTools) {
     cmGeneratorTarget::ModuleDefinitionInfo const* mdi =