patch 8.2.0592: MS-Windows with VTP: cursor is not made invisible

Problem:    MS-Windows with VTP: cursor is not made invisible.
Solution:   Output the code to make the cursor visible or invisible. (Nobuhiro
            Takasaki, closes #5941)

src/os_win32.c

@@ -5996,6 +5996,10 @@ visual_bell(void)
 cursor_visible(BOOL fVisible)
 {
     s_cursor_visible = fVisible;
+
+    if (USE_VTP)
+	vtp_printf("\033[?25%c", fVisible ? 'h' : 'l');
+
 # ifdef MCH_CURSOR_SHAPE
     mch_update_cursor();
 # endif

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    592,
 /**/
     591,
 /**/