fix landing page search

[benwbrum]

keep it above the image sets, add the search button, make sure it works.

[benwbrum]

The problem is a "search toggle" button getting rendered over the form. Disable this:

#search-form+button.search-toggle {
    bottom: 0;
    position: absolute;
    width: 36px;
    height: 36px;
    border-bottom: 0;
    color: #b8b8b8;
    display: none;  # <-- Add this line
}