patch 9.0.0321: cannot use the message popup window directly

Problem:    Cannot use the message popup window directly.
Solution:   Add ":echowindow".
diff --git a/src/ex_cmdidxs.h b/src/ex_cmdidxs.h
index b4743cd..fe5ca9b 100644
--- a/src/ex_cmdidxs.h
+++ b/src/ex_cmdidxs.h
@@ -10,27 +10,27 @@
   /* c */ 45,
   /* d */ 112,
   /* e */ 137,
-  /* f */ 165,
-  /* g */ 182,
-  /* h */ 188,
-  /* i */ 197,
-  /* j */ 217,
-  /* k */ 219,
-  /* l */ 224,
-  /* m */ 287,
-  /* n */ 305,
-  /* o */ 325,
-  /* p */ 337,
-  /* q */ 376,
-  /* r */ 379,
-  /* s */ 399,
-  /* t */ 469,
-  /* u */ 515,
-  /* v */ 526,
-  /* w */ 547,
-  /* x */ 561,
-  /* y */ 571,
-  /* z */ 572
+  /* f */ 166,
+  /* g */ 183,
+  /* h */ 189,
+  /* i */ 198,
+  /* j */ 218,
+  /* k */ 220,
+  /* l */ 225,
+  /* m */ 288,
+  /* n */ 306,
+  /* o */ 326,
+  /* p */ 338,
+  /* q */ 377,
+  /* r */ 380,
+  /* s */ 400,
+  /* t */ 470,
+  /* u */ 516,
+  /* v */ 527,
+  /* w */ 548,
+  /* x */ 562,
+  /* y */ 572,
+  /* z */ 573
 };
 
 /*
@@ -45,7 +45,7 @@
   /* b */ {  2,  0,  0,  5,  6,  8,  0,  0,  0,  0,  0,  9, 10, 11, 12, 13,  0, 14,  0,  0,  0,  0, 23,  0,  0,  0 },
   /* c */ {  3, 12, 16, 18, 20, 22, 25,  0,  0,  0,  0, 33, 38, 41, 47, 57, 59, 60, 61,  0, 63,  0, 66,  0,  0,  0 },
   /* d */ {  0,  0,  0,  0,  0,  0,  0,  0,  8, 18,  0, 19,  0,  0, 20,  0,  0, 22, 23,  0,  0,  0,  0,  0,  0,  0 },
-  /* e */ {  1,  0,  2,  0,  0,  0,  0,  0,  0,  0,  0,  8, 10, 11,  0,  0,  0,  0,  0,  0,  0, 22,  0, 23,  0,  0 },
+  /* e */ {  1,  0,  2,  0,  0,  0,  0,  0,  0,  0,  0,  9, 11, 12,  0,  0,  0,  0,  0,  0,  0, 23,  0, 24,  0,  0 },
   /* f */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 10,  0,  0,  0,  0,  0, 16,  0,  0,  0,  0,  0 },
   /* g */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  0,  0,  2,  0,  0,  4,  5,  0,  0,  0,  0 },
   /* h */ {  5,  0,  0,  0,  0,  0,  0,  0,  6,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 },
@@ -69,4 +69,4 @@
   /* z */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }
 };
 
-static const int command_count = 589;
+static const int command_count = 590;