patch 9.0.0296: message in popup is shortened unnecessary

Problem:    Message in popup is shortened unnecessary.
Solution:   Do not use 'showcmd' and 'ruler' for a message in the popup.
            Set the timer when unhiding the message popup.

src/message.c

@@ -206,7 +206,11 @@ msg_strtrunc(
 			       && !exmode_active && msg_silent == 0) || force)
     {
 	len = vim_strsize(s);
-	if (msg_scrolled != 0)
+	if (msg_scrolled != 0
+#ifdef HAS_MESSAGE_WINDOW
+		|| use_message_window()
+#endif
+		)
 	    // Use all the columns.
 	    room = (int)(Rows - msg_row) * Columns - 1;
 	else
@@ -3719,7 +3723,11 @@ msg_end(void)
     void
 msg_check(void)
 {
-    if (msg_row == Rows - 1 && msg_col >= sc_col)
+    if (msg_row == Rows - 1 && msg_col >= sc_col
+#ifdef HAS_MESSAGE_WINDOW
+		&& !use_message_window()
+#endif
+	    )
     {
 	need_wait_return = TRUE;
 	redraw_cmdline = TRUE;

src/popupwin.c

@@ -4501,7 +4501,7 @@ popup_show_message_win(void)
 	    popup_update_color(message_win, TYPE_MESSAGE_WIN);
 	    popup_show(message_win);
 	}
-	else if (message_win->w_popup_timer != NULL)
+	if (message_win->w_popup_timer != NULL)
 	    timer_start(message_win->w_popup_timer);
     }
 }

src/testdir/dumps/Test_cmdheight_zero_4.dump

@@ -0,0 +1,6 @@
+|s+0&#ffffff0|o|m|e| >t|e|x|t| @65
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|═+0#e000002&@74
+|T|y|p|e| @1|:|q|a|!| @1|a|n|d| |p|r|e|s@1| |<|E|n|t|e|r|>| |t|o| |a|b|a|n|d|o|n| |a|l@1| |c|h|a|n|g|e|s| |a|n|d| |e|x|i|t| |V|i|m| @9

src/testdir/test_messages.vim

@@ -493,10 +493,30 @@ func Test_cmdheight_zero_dump()
   call term_sendkeys(buf, "\<Esc>:echo 'message window'\<CR>")
   call VerifyScreenDump(buf, 'Test_cmdheight_zero_3', {})
 
+  " Message for CTRL-C is in the popup window
+  "call term_sendkeys(buf, ":call popup_clear()\<CR>")
+  call term_sendkeys(buf, "\<C-C>")
+  call VerifyScreenDump(buf, 'Test_cmdheight_zero_4', {})
+
   " clean up
   call StopVimInTerminal(buf)
   call delete('XtestCmdheight')
 endfunc
 
+func Test_cmdheight_zero_shell()
+  CheckUnix
+
+  set cmdheight=0
+  set nomore
+  call setline(1, 'foo!')
+  silent !echo <cWORD> > Xfile.out
+  call assert_equal(['foo!'], readfile('Xfile.out'))
+  call delete('Xfile.out')
+  redraw!
+
+  set more&
+  set cmdheight&
+endfunc
+
 
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -707,6 +707,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    296,
 /**/
     295,
 /**/