vim: Import v8.1.1605

* 8.1.1605: Vim may delay processing messages on a json channel
* 8.1.1604: popup window scroll test is flaky
* 8.1.1603: crash when using unknown highlighting in text property
* 8.1.1602: popup window cannot overflow on the left or right

gitlog.txt

@@ -1 +1 @@
-* [8.1.1601](https://github.com/vim/vim/releases/tag/v8.1.1601): missing changes to popup window test file\n* [8.1.1600](https://github.com/vim/vim/releases/tag/v8.1.1600): cannot specify highlighting for popup window scrollbar\n* [8.1.1599](https://github.com/vim/vim/releases/tag/v8.1.1599): compiler warning for uninitialized variable\n* [8.1.1598](https://github.com/vim/vim/releases/tag/v8.1.1598): update to test file missing\n* [8.1.1597](https://github.com/vim/vim/releases/tag/v8.1.1597): cannot scroll a popup window with the mouse\n* [8.1.1596](https://github.com/vim/vim/releases/tag/v8.1.1596): when resizing the screen may draw popup in wrong position\n* [8.1.1595](https://github.com/vim/vim/releases/tag/v8.1.1595): MS-Windows with VIMDLL: colors wrong in console
+* [8.1.1605](https://github.com/vim/vim/releases/tag/v8.1.1605): Vim may delay processing messages on a json channel\n* [8.1.1604](https://github.com/vim/vim/releases/tag/v8.1.1604): popup window scroll test is flaky\n* [8.1.1603](https://github.com/vim/vim/releases/tag/v8.1.1603): crash when using unknown highlighting in text property\n* [8.1.1602](https://github.com/vim/vim/releases/tag/v8.1.1602): popup window cannot overflow on the left or right