update comment

Change-Id: I5972213747dcb453ff9076d48747772c3f528fd7
Reviewed-on: https://gerrit.libreoffice.org/68181
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

cui/source/tabpages/numfmt.cxx

@@ -234,7 +234,7 @@ SvxNumberFormatTabPage::SvxNumberFormatTabPage(TabPageParent pParent,
     auto nWidth = approximate_char_width() * 26;
     m_xLbCategory->set_size_request(nWidth, m_xLbCategory->get_height_rows(7));
     m_xLbFormat->set_size_request(nWidth, m_xLbFormat->get_height_rows(5));
-    m_xLbCurrency->set_size_request(nWidth, -1);  // width of 1, so real width will be that of its LbFormat sibling
+    m_xLbCurrency->set_size_request(nWidth, -1);  // force using (narrower) width of its LbFormat sibling
 
     // Initially remove the "Automatically" entry.
     m_xLbCurrency->set_active(-1); // First ensure that nothing is selected.