[vim] Don't set wfw, wfh, bh options when opening popup (#2042)

* No need to restore &wfw and &wfh when using popup window

Co-authored-by: lacygoill <lacygoill@lacygoill.me>
Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>

plugin/fzf.vim

@@ -678,9 +678,11 @@ function! s:split(dict)
         endif
       endfor
     endif
-    return [ppos, { '&l:wfw': &l:wfw, '&l:wfh': &l:wfh }, is_popup]
+    return [ppos, is_popup ? {} : { '&l:wfw': &l:wfw, '&l:wfh': &l:wfh }, is_popup]
   finally
-    setlocal winfixwidth winfixheight
+    if !is_popup
+      setlocal winfixwidth winfixheight
+    endif
   endtry
 endfunction
 
@@ -751,9 +753,6 @@ function! s:execute_term(dict, command, temps) abort
     if has('nvim')
       call termopen(command, fzf)
     else
-      if !len(&bufhidden)
-        setlocal bufhidden=hide
-      endif
       let term_opts = {'exit_cb': function(fzf.on_exit)}
       if is_popup
         let term_opts.hidden = 1