patch 9.0.0683: cannot specify a time for :echowindow
Problem: Cannot specify a time for :echowindow.
Solution: A count can be used to specify the display time. Add
popup_findecho().
diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index e2d5cfe..97e1d5c 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -1289,6 +1289,7 @@
popup_filter_yesno() block until 'y' or 'n' is pressed
popup_getoptions() get current options for a popup
popup_getpos() get actual position and size of a popup
+ popup_findecho() get window ID for popup used for `:echowindow`
popup_findinfo() get window ID for popup info window
popup_findpreview() get window ID for popup preview window
popup_list() get list of all popup window IDs