patch 8.2.2963: GUI: mouse move may start Visual mode with a popup visible

Problem:    GUI: mouse move may start Visual mode with a popup visible.
Solution:   Add special code for mouse move. (closes #8318)
diff --git a/src/keymap.h b/src/keymap.h
index 6efb13d..4ce5144 100644
--- a/src/keymap.h
+++ b/src/keymap.h
@@ -273,8 +273,9 @@
     , KE_FOCUSGAINED = 98	// focus gained
     , KE_FOCUSLOST = 99		// focus lost
     , KE_MOUSEMOVE = 100	// mouse moved with no button down
-    , KE_CANCEL = 101		// return from vgetc()
-    , KE_COMMAND = 102		// <Cmd> special key
+    , KE_MOUSEMOVE_XY = 101	// KE_MOUSEMOVE with coordinates
+    , KE_CANCEL = 102		// return from vgetc()
+    , KE_COMMAND = 103		// <Cmd> special key
 };
 
 /*