[Bug 34563] New: Regression in fae9738cc37c4d30710f12ee99abc11c7ae37130: rFactor 2 ModMgr.exe buttons not working properly

http://bugs.winehq.org/show_bug.cgi?id=34563

Bug #: 34563
           Summary: Regression in
                    fae9738cc37c4d30710f12ee99abc11c7ae37130: rFactor 2
                    ModMgr.exe buttons not working properly
           Product: Wine
           Version: 1.5.26
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

The Mod Manager (ModMgr.exe) of rFactor 2 has stopped working with the above
commit. I found it by means of git bisect.

How it is supposed to work:
There is a list of items that can be installed. After marking one and then
clicking the "Install" button a small popup window appears informing about the
status of the action. On success said popup closes and the item will show up as
installed.

What happens with the above commit applied:
ModMgr.exe starts as usual, one can select items from the list. But on clicking
say the "Install" button it only gets disabled (the label characters turns from
black to grey) and nothing else happens.
To me it looks like the action associated with those buttons is not executed.