Revert #1019 to fix nvim artifacts and flickering. (#1021)

* Revert "Use :mode only in neovim. MacVim still needs to use :redraw! (#1019)"

This reverts commit 4ac07f52a3.

* If not Neovim, use `:redraw!` as was done before.

* Update version number.

* Fix punctuation in NERDTree Menu instructions.

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Change Log
 
 #### 5.2...
+- **.8**: Revert [#1019](https://github.com/scrooloose/nerdtree/pull/1019) to fix nvim artifacts and flickering. (PhilRunninger) [#1021](https://github.com/scrooloose/nerdtree/pull/1021)
+- **.7**: Use :mode only in neovim. MacVim still needs to use :redraw! [#1019](https://github.com/scrooloose/nerdtree/pull/1019)
 - **.6**: In CHANGELOG.md and PR template, make reference to PR a true HTML link. [#1017](https://github.com/scrooloose/nerdtree/pull/1017)
 - **.5**: Use `:mode` instead of `:redraw!` when updating menu. (PhilRunninger) [#1016](https://github.com/scrooloose/nerdtree/pull/1016)
 - **.4**: When searching for root line num, stop at end of file. (PhilRunninger) [#1015](https://github.com/scrooloose/nerdtree/pull/1015)

lib/nerdtree/menu_controller.vim

@@ -31,7 +31,11 @@ function! s:MenuController.showMenu()
         let l:done = 0
 
         while !l:done
+            if has('nvim')
                 mode
+            else
+                redraw!
+            endif
             call self._echoPrompt()
 
             let l:key = nr2char(getchar())
@@ -64,7 +68,7 @@ function! s:MenuController._echoPrompt()
 
         echo "Menu: [" . join(shortcuts, ",") . "] (" . navHelp . " or shortcut): "
     else
-        echo "NERDTree Menu. " . navHelp . " . or the shortcuts indicated"
+        echo "NERDTree Menu. " . navHelp . ", or the shortcuts indicated"
         echo "========================================================="
 
         for i in range(0, len(self.menuItems)-1)