The icon of menu button (☰) in Notebookbar does not well aligned, which shifted to the left. It should be aligned at the center.
Steps to Reproduce:
1. Enabling experimental feature in Options.
2. Toolbar -> Toolbar Layout -> Notebookbar
User Profile Reset: No
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
LO 126.96.36.199.beta1 Build ID: 97471ab4eb4db4c487195658631696bb3238656c
Threads CPU : 2; OS : Windows 6.1; UI Render : par défaut;
Locale : en-US (fr_FR); Calc: CL
LO 188.8.131.52.alpha1+ Build ID: 133d617a7758acb342d82e5d446e165cd87e2cac
CPU threads: 2; OS: Windows 6.1; UI render: default;
TinderBox: Win-x86@42, Branch:master, Time: 2017-11-18_01:48:12
Locale: fr-FR (fr_FR); Calc: CL
Still reproduce with
Version: 184.108.40.206 (x64)
CPU 线程：4; 操作系统：Windows 10.0; UI 渲染：默认;
区域语言：zh-CN (zh_CN); Calc: group
I fixed it in colibre with draw the hamburger icon not align ;-) but would be nice if it will work codewise.