Qt prompt highlighting

When qt_yn_function() or qt_more() is asking for a single character
response, typing anything will cause the prompt line in the message
window to stop being highlighted.  If they reject what's been typed,
they beep (--More-- doesn't start beeping until second rejection);
change both of them to also rehighlight the prompt line to give a
visual indication that the question/acknowledgement is still being
asked.

win/Qt/qt_bind.cpp

@@ -588,6 +588,11 @@ char NetHackQtBind::qt_more()
             default:
                 if (++complain > 1)
                     NetHackQtBind::qt_nhbell();
+                // typing anything caused the most recent message line
+                // (which happens to our prompt) from having highlighting
+                // be removed; put that back
+                if (mesgwin)
+                    mesgwin->RehighlightPrompt();
                 retry = true;
                 break;
             }
@@ -669,6 +674,13 @@ char NetHackQtBind::qt_yn_function(const char *question_,
                     Strcpy(cbuf, visctrl(def));
 		} else {
 		    NetHackQtBind::qt_nhbell();
+                    // typing anything caused the most recent message line
+                    // (which happens to our prompt) from having highlighting
+                    // be removed; put that back
+                    NetHackQtMessageWindow
+                            *mesgwin = main ? main->GetMessageWindow() : NULL;
+                    if (mesgwin)
+                        mesgwin->RehighlightPrompt();
 		    // and try again...
 		}
 	    } else {

win/Qt/qt_msg.cpp

@@ -184,6 +184,14 @@ void NetHackQtMessageWindow::AddToStr(const char *answer)
     }
 }
 
+// used when yn_function() or more() rejects player's input and tries again
+void NetHackQtMessageWindow::RehighlightPrompt()
+{
+    // selects most recent message, which causes it to be highlighted
+    if (list && list->count())
+        list->setCurrentRow(list->count() - 1);
+}
+
 // are there any highlighted messages?
 bool NetHackQtMessageWindow::hilit_mesgs()
 {

win/Qt/qt_msg.h

@@ -30,6 +30,7 @@ public:
 
 	void setMap(NetHackQtMapWindow2*);
 
+        void RehighlightPrompt();
         bool hilit_mesgs();
         void unhighlight_mesgs();
         // for adding the answer for yn() to its prompt string