fix, not possible to clear searches results

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v3.9.9-dev
+
+## Bugs fixed
+
+- Messages, when selected, the recently added _Search Results_ category could not be emptied.
+
 # v3.9.8
 
 ## Enhancements

src/u_messages.pas

@@ -778,7 +778,7 @@ end;
 procedure TMessagesWidget.actClearCurCatExecute(Sender: TObject);
 begin
   case fCtxt of
-    amcAll, amcApp, amcMisc :
+    amcAll, amcApp, amcMisc, amcSearch:
       clearbyContext(fCtxt);
     amcEdit: if fDoc.isAssigned then
       clearbyData(fDoc);