Fix: Netrw Tree Style Listing moves the cursor to a different position.

Problem: Netrw Tree Style Listing moves the cursor to a different
         position when the user presses the Enter key to perform a
	 directory listing; in a Netrw buffer that the user has
	 reloaded with ':edit' or ':buffer'.

Solution: The "Perform Directory Listing" part of the function
          's:NetrwBrowse()' should only call 'winrestview()' when the
	  listing style of Netrw is not tree style listing.

runtime/autoload/netrw.vim

@@ -4048,7 +4048,9 @@ fun! s:NetrwBrowse(islocal,dirname)
   " Otherwise            : set rexposn
   if exists("s:rexposn_".bufnr("%"))
 "   call Decho("restoring posn to s:rexposn_".bufnr('%')."<".string(s:rexposn_{bufnr('%')}).">",'~'.expand("<slnum>"))
-   NetrwKeepj call winrestview(s:rexposn_{bufnr('%')})
+   if ! (exists("w:netrw_liststyle") && w:netrw_liststyle ==# s:TREELIST)
+      NetrwKeepj call winrestview(s:rexposn_{bufnr('%')})
+   endif
    if exists("w:netrw_bannercnt") && line(".") < w:netrw_bannercnt
     NetrwKeepj exe w:netrw_bannercnt
    endif