Alt key in wixstdba messes up the foreground/background of controls

[wixbot]

Problem occurs if we have image on page, controls over it and Alt(+Click) pressed.

What happend when the ALT key pressed:
Window contorls styles must be highlighted by undrelining access key (for access by Alt+).
If we have owner-draw controls (such as image) on the page they are always redrawn if ALT pressed via receiving WM_DRAWITEM. Controls without SS_OWNERDRAW does not do this. Therefore, their background is erased.

Code to reproduce:

<Theme xmlns="http://wixtoolset.org/schemas/thmutil/2010" ImageFile="bg.png">
  <Window Width="614" Height="415" HexStyle="100a0000" FontId="0" SourceX="0" SourceY="0">#(loc.Caption)</Window>
  <Page Name="Help">
    <Image X="0" Y="0" Width="614" Height="415" ImageFile="bgClear.png"/>
    <Text X="25" Y="85" Width="-25" Height="32" FontId="1" DisablePrefix="yes">#(loc.HelpHeader)</Text>
    <Text X="25" Y="120" Width="-25" Height="-101" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Text>
    <Button Name="HelpCancelButton" X="-25" Y="-35" Width="103" Height="23" TabStop="yes" FontId="0" DisablePrefix="yes">#(loc.HelpCloseButton)</Button>
  </Page>

Originally opened by pavelanfimov

[wixbot]

The situation are the same as discribed here

Originally posted by pavelanfimov

[wixbot]

see pullrequest wixtoolset/wix3#309

Originally posted by pavelanfimov

[wixbot]

Originally changed by pavelanfimov
Resolution set to open

[wixbot]

Originally changed by pavelanfimov
Resolution changed from open to

[wixbot]

Release changed from v3.10 to v3.x

[drolevar]

@rseanhall
This fix has been accepted in to wix4 branch: wixtoolset/dutil#24.
Since it's been an annoying issue for a lot of people it might be a good idea to accept it into wix3: wixtoolset/wix3#527