Reduce flicker when resizing in option menus

Do not update the main windows when resizing the terminal in the general
options menu or in the notification options menu.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/calcurse.h

@@ -1093,6 +1093,7 @@ void wins_get_config(void);
 void wins_update_border(int);
 void wins_update_panels(int);
 void wins_update(int);
+void wins_reset_noupdate(void);
 void wins_reset(void);
 void wins_prepare_external(void);
 void wins_unprepare_external(void);

src/custom.c

@@ -802,7 +802,7 @@ void custom_general_config(void)
 
 		if (resize) {
 			resize = 0;
-			wins_reset();
+			wins_reset_noupdate();
 			listbox_resize(&lb, 0, 0, notify_bar() ? row - 3 : row - 2, col);
 			listbox_draw_deco(&lb);
 			delwin(win[STA].p);

src/notify.c

@@ -786,7 +786,7 @@ void notify_config_bar(void)
 		if (resize) {
 			resize = 0;
 			wins_get_config();
-			wins_reset();
+			wins_reset_noupdate();
 			listbox_resize(&lb, 0, 0, notify_bar() ? row - 3 : row - 2, col);
 			listbox_draw_deco(&lb);
 			delwin(win[STA].p);

src/wins.c

@@ -584,12 +584,18 @@ void wins_update(int flags)
 }
 
 /* Reset the screen, needed when resizing terminal for example. */
-void wins_reset(void)
+void wins_reset_noupdate(void)
 {
 	endwin();
 	wins_refresh();
 	curs_set(0);
 	wins_reinit();
+}
+
+/* Reset the screen, needed when resizing terminal for example. */
+void wins_reset(void)
+{
+	wins_reset_noupdate();
 	wins_update(FLAG_ALL);
 }