<blockquote>I have disable the responsive layout for ja-biz and when I make the browser screen smaller the mega menu disappears. I have disable the responsive layout for ja-biz and when I make the browser screen smaller the mega menu disappears.
Non-Responsive Width is set to 971px and at exactly 989px width the menu disappears.</blockquote>
Because mega menu disappears in max-width: 990px
<blockquote>I also have been working on this issue. But the thing what I tried is quite complicated. I want responsive enabled but I want menu to be wrap to second and third line, as multiple positions in one row do.</blockquote>
You need to backup your site first.
Then, open the variables.less file in templatesja_bizless folder and change:
[PHP]// Point at which the navbar stops collapsing
@grid-float-breakpoint: @screen-sm-max;[/PHP]
To
[PHP]// Point at which the navbar stops collapsing
@grid-float-breakpoint: @screen-sm-min;[/PHP]
Once done, click button Complies less to css.