[Bug 54222] New: [COMCTL32] Comboboxes v6 with many elements do auto-close erroneously with low vertical resolution when clicking on the text

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54222

Bug ID: 54222
           Summary: [COMCTL32] Comboboxes v6 with many elements do
                    auto-close erroneously with low vertical resolution
                    when clicking on the text
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
          Assignee: [e-mail]
          Reporter: [e-mail]

From ReactOS JIRA : https://jira.reactos.org/browse/CORE-18769

Reproduction steps

set a very low screen resolution, e.g. 640x480 to limit available vertical
space
the attached timedate_unlimited.cpl uses a v6 combobox that does not explicitly
limit the amount of elements in its timezone combobox yet, and therefore will
show 30 elements by default
30 elements are so many, that the expanded box would not fit all of them to the
screen in 640x480, neither when expanding the combobox to the bottom, nor when
it expands the combobox to the top
place the dialog in the vertical center of the screen
open the v6 combobox with a single click on its text, not a click on the small
triangle to the right
Expected result
 2k3sp2 would still show the combobox in expanded state when the mouse button
is released 2k3sp2_ok.png

Observed result
On ros with comctl32 v6 combobox from Wine the combobox will expand on the
click as intended,
 but the release of the mouse button will already do the selection and
therefore the bx auto-closes immediately again unintentionally.
 ROS_0.4.15-dev-5402-gf908d37_affected.webm

We do believe this to be a bug in Wines comctl32 v6.

Reminder

Use only the timedate_unlimited.cpl attached here for testing, not the one from
master, as it got a workaround already)