patch 8.1.1917: non-current window is not redrawn when moving popup

Problem:    Non-current window is not redrawn when moving popup. (Ben Jackson)
Solution:   Redraw all windows under a popup. (closes #4860)
diff --git a/src/version.c b/src/version.c
index 51851e3..ae4b4e9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1917,
+/**/
     1916,
 /**/
     1915,