patch 8.0.0820: GUI: cursor in terminal window lags behind

Problem:    GUI: cursor in terminal window lags behind.
Solution:   call gui_update_cursor() under different conditions. (Ozaki
            Kiichi, closes #1893)
diff --git a/src/terminal.c b/src/terminal.c
index be76161..b289f6c 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -51,6 +51,9 @@
  *     job finishes).
  * - add option values to the command:
  *      :term <24x80> <close> vim notes.txt
+ * - support different cursor shapes, colors and attributes
+ * - make term_getcursor() return type (none/block/bar/underline) and
+ *   attributes (color, blink, etc.)
  * - To set BS correctly, check get_stty(); Pass the fd of the pty.
  * - do not store terminal window in viminfo.  Or prefix term:// ?
  * - add a character in :ls output
@@ -359,7 +362,7 @@
 	    cursor_on();
 	out_flush();
 #ifdef FEAT_GUI
-	if (gui.in_use && term->tl_cursor_visible)
+	if (gui.in_use)
 	    gui_update_cursor(FALSE, FALSE);
 #endif
     }
@@ -1034,7 +1037,7 @@
     if (term->tl_buffer == curbuf)
     {
 	may_toggle_cursor(term);
-	update_cursor(term, TRUE);
+	update_cursor(term, term->tl_cursor_visible);
     }
 
     return 1;
@@ -1180,11 +1183,12 @@
 	/* Need to break out of vgetc(). */
 	ins_char_typebuf(K_IGNORE);
 
-	if (curbuf->b_term != NULL)
+	term = curbuf->b_term;
+	if (term != NULL)
 	{
-	    if (curbuf->b_term->tl_job == ch->ch_job)
+	    if (term->tl_job == ch->ch_job)
 		maketitle();
-	    update_cursor(curbuf->b_term, TRUE);
+	    update_cursor(term, term->tl_cursor_visible);
 	}
     }
 }
diff --git a/src/version.c b/src/version.c
index 2d4c50e..8733db2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    820,
+/**/
     819,
 /**/
     818,