Content area missing responsive styling

[Clorith]

The rest of .org/support seems to be responsive except the content area, making it quite hard to use on mobile devices as you get side scrolling for the actual post content.

Attached a screenshot for clarification, the styling in question appears to be .col-10 in wp4.css:914

[Clorith]

Descriptive screenshot of missing responsive styling

[mlteal]

Add a media query to forum-wp4.css to help eliminate horizontal scroll because of .col-6 and .col-12's fixed widths.

@media screen and ( max-width: 960px ) {
  .col-6, .col-12 {
    width: 100%;
    padding: 0 14px;
    margin: 0;
    box-sizing: border-box;
  }
}

Still need to address the Add New Topic and Reply sections.

[nacin]

In 726:

Initial pass at making the support forums responsive.

props mlteal.
fixes #271.

[nacin]

In 728:

Add col-8 to forum responsive styles. props mlteal. see #271.