patch 8.1.2321: cannot select all text with the mouse

Problem:    Cannot select all text with the mouse. (John Marriott)
Solution:   Move limiting the mouse column to f_getmousepos(). (closes #5242)
diff --git a/src/version.c b/src/version.c
index e1ffa9e..f512b08 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2321,
+/**/
     2320,
 /**/
     2319,