Revert "Ticket #2453: aggressive screen repaint"

This reverts commit f809e6cf7a8b6584f1500d049f133557152dab6d.

While navigating in main menu (from one submenu to another one)
or after closing a dialog, the screen is blinking.

lib/tty/tty-ncurses.c

@@ -280,14 +280,6 @@ tty_touch_screen (void)
 
 /* --------------------------------------------------------------------------------------------- */
 
-void
-tty_touch_lines (int start, int num)
-{
-    touchline (stdscr, start, num);
-}
-
-/* --------------------------------------------------------------------------------------------- */
-
 void
 tty_gotoyx (int y, int x)
 {

lib/tty/tty-slang.c

@@ -453,14 +453,6 @@ tty_touch_screen (void)
 
 /* --------------------------------------------------------------------------------------------- */
 
-void
-tty_touch_lines (int start, int num)
-{
-    SLsmg_touch_lines (start, num);
-}
-
-/* --------------------------------------------------------------------------------------------- */
-
 void
 tty_gotoyx (int y, int x)
 {

lib/tty/tty.h

@@ -110,7 +110,6 @@ extern int tty_lowlevel_getch (void);
 
 extern int tty_reset_screen (void);
 extern void tty_touch_screen (void);
-extern void tty_touch_lines (int start, int num);
 
 extern void tty_gotoyx (int y, int x);
 extern void tty_getyx (int *py, int *px);

lib/widget/dialog.c

@@ -871,12 +871,7 @@ do_refresh (void)
     if (fast_refresh)
     {
         if ((d != NULL) && (d->data != NULL))
-        {
+            dlg_redraw ((Dlg_head *) d->data);
-            Dlg_head *dlg = (Dlg_head *) d->data;
-
-            tty_touch_lines (dlg->y, dlg->lines);
-            dlg_redraw (dlg);
-        }
     }
     else
     {
@@ -884,10 +879,6 @@ do_refresh (void)
         for (; d != NULL; d = g_list_next (d))
             if ((d->data != NULL) && ((Dlg_head *) d->data)->fullscreen)
                 break;
-
-        /* Clear entire screen to avoid artefacts after printing of non-printable symbols. */
-        clr_scr ();
-
         /* back to top dialog */
         for (; d != NULL; d = g_list_previous (d))
             if (d->data != NULL)