Customized zoom size

[HGYGO]

Environment

• Operating System: ubuntu 16.04
• Vim version :version: vim8.1
• NERDTree version git rev-parse --short HEAD:
• NERDTree settings applied in your vimrc, if any:

Process

1. Zoom NERD tree window

Current Result

Zoom will take almost full screen

Expected Result

Customize zoom size by global variable in vimrc

Screenshot(s)

Possible Fix

add g:NERDTreeZoomSize to ui.vim

function! s:UI.toggleZoom()
if exists("b:NERDTreeZoomed") && b:NERDTreeZoomed
let size = exists("b:NERDTreeOldWindowSize") ? b:NERDTreeOldWindowSize : g:NERDTreeWinSize
exec "silent vertical resize ". size
let b:NERDTreeZoomed = 0
else
exec "vertical resize ". g:NERDTreeZoomSize
let b:NERDTreeZoomed = 1
endif
endfunction