tdf#142150 nothing already selected on MouseUp without previous MouseDown

if mouse down was on tooltip (possible on macOS)

Change-Id: Icb4328fa6977356c3bac5f37d42e99ae8d4e4b98
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116158
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
diff --git a/svtools/source/control/valueset.cxx b/svtools/source/control/valueset.cxx
index 1d961ad..5ce7298 100644
--- a/svtools/source/control/valueset.cxx
+++ b/svtools/source/control/valueset.cxx
@@ -510,7 +510,9 @@ bool ValueSet::MouseButtonUp( const MouseEvent& rMouseEvent )
{
    if (rMouseEvent.IsLeft() && !rMouseEvent.IsMod2())
    {
        Select();
        // tdf#142150 MouseUp seen without previous MouseDown
        if (mnSelItemId)
            Select();
        return true;
    }