vim: Import v8.1.1456

* 8.1.1456: WinBar not redrawn after scrolling one line
* 8.1.1455: popup_atcursor() not completely implemented
* 8.1.1454: build failure without the conceal feature
* 8.1.1453: popup window "moved" property not implemented yet
* 8.1.1452: line and col property of popup windows not properly checked
* 8.1.1451: CTRL-L does not clear screen with a popup window
* 8.1.1450: popup window positioning wrong when using padding or borders
* 8.1.1449: popup text truncated at end of screen
* 8.1.1448: statusline is sometimes drawn on top of popup
* 8.1.1447: not allowed to create an empty popup

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.1.1446](https://github.com/vim/vim/releases/tag/v8.1.1446): popup window callback not implemented yet\n* [8.1.1445](https://github.com/vim/vim/releases/tag/v8.1.1445): popup window border highlight not implemented yet\n* [8.1.1444](https://github.com/vim/vim/releases/tag/v8.1.1444): not using double line characters for popup border\n* [8.1.1443](https://github.com/vim/vim/releases/tag/v8.1.1443): popup window padding and border not implemented yet\n* [8.1.1442](https://github.com/vim/vim/releases/tag/v8.1.1442): popup windows not considered when the Vim window is resized\n* [8.1.1441](https://github.com/vim/vim/releases/tag/v8.1.1441): popup window filter not yet implemented\n* [8.1.1440](https://github.com/vim/vim/releases/tag/v8.1.1440): win_execute() test fails\n* [8.1.1439](https://github.com/vim/vim/releases/tag/v8.1.1439): json_encode() is very slow for large results\n* [8.1.1438](https://github.com/vim/vim/releases/tag/v8.1.1438): some commands cause trouble in a popup window\n* [8.1.1437](https://github.com/vim/vim/releases/tag/v8.1.1437): code to handle callbacks is duplicated
+* [8.1.1456](https://github.com/vim/vim/releases/tag/v8.1.1456): WinBar not redrawn after scrolling one line\n* [8.1.1455](https://github.com/vim/vim/releases/tag/v8.1.1455): popup_atcursor() not completely implemented\n* [8.1.1454](https://github.com/vim/vim/releases/tag/v8.1.1454): build failure without the conceal feature\n* [8.1.1453](https://github.com/vim/vim/releases/tag/v8.1.1453): popup window "moved" property not implemented yet\n* [8.1.1452](https://github.com/vim/vim/releases/tag/v8.1.1452): line and col property of popup windows not properly checked\n* [8.1.1451](https://github.com/vim/vim/releases/tag/v8.1.1451): CTRL-L does not clear screen with a popup window\n* [8.1.1450](https://github.com/vim/vim/releases/tag/v8.1.1450): popup window positioning wrong when using padding or borders\n* [8.1.1449](https://github.com/vim/vim/releases/tag/v8.1.1449): popup text truncated at end of screen\n* [8.1.1448](https://github.com/vim/vim/releases/tag/v8.1.1448): statusline is sometimes drawn on top of popup\n* [8.1.1447](https://github.com/vim/vim/releases/tag/v8.1.1447): not allowed to create an empty popup