Filtering by specific plugin ratings adds horizontal scroll

[Clorith]

When adding a filter to the plugin reviews forum list a horizontal scroll is added (when the query arg ?filter=4 is in use)

Caused by the 14px margin coming from the following rule:

.col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
    float: left;
    margin: 0 14px;
}

[coffee2code]

In 4088:

Forums Theme: Remove horizontal scroll from filtered ratings views.

Props SergeyBiryukov.
Fixes #2050.