Dispay pre- and posttext widgets if non-empty also if unapplied

Fixes: #11352
(cherry picked from commit b8932afed5)

src/frontends/qt4/GuiCitation.cpp

@@ -284,7 +284,10 @@ void GuiCitation::updateFormatting(CitationStyle const & currentStyle)
 	bool const qualified = currentStyle.hasQualifiedList
 		&& (rows > 1
 		    || !params_["pretextlist"].empty()
-		    || !params_["posttextlist"].empty());
+		    || !params_["posttextlist"].empty()
+		    || !getPreTexts().empty()
+		    || !getPostTexts().empty());
+
 	selectedLV->horizontalHeader()->setVisible(qualified);
 	selectedLV->setColumnHidden(0, !qualified);
 	selectedLV->setColumnHidden(2, !qualified);

status.23x

@@ -176,6 +176,9 @@ What's new
 - Merge paragraphs when pasted into an inset that forbids multiple
   paragraphs (bug 8281).
 
+- Fix display issue of individual pre- and posttext in citation dialog
+  (biblatex only) (bug 11352).
+
 
 * INTERNALS