Fix vertical text for swimlanes in IE11
Fix vertical text for swimlanes in IE11

https://github.com/wekan/wekan/issues/1798

wekan/wekan,GhassenRjab/wekan,libreboard/libreboard,wekan/wekan,wekan/wekan,libreboard/libreboard,wekan/wekan,GhassenRjab/wekan,wekan/wekan,GhassenRjab/wekan