patch 8.2.4806: a mapping using <LeftDrag> does not start Select mode

Problem:    A mapping using <LeftDrag> does not start Select mode.
Solution:   When checking for starting select mode with the mouse also do this
            when there is typeahead. (closes #10249)
diff --git a/src/version.c b/src/version.c
index 28ac75e..6df25da 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4806,
+/**/
     4805,
 /**/
     4804,