BS4 responsive layout

[empt-ak]

• [x] search breaks badly on xs view [should fixed be in v4]
• [x] navbar pills on landing page break badly [should fixed be in v4]
• [x] left sidebar does not look good on xs
• [x] right sidebar should be collapsed on sm and lower?
• [x] hide banner on sm and lower
• [x] hide thumbnails on topcom/com/coll view
• [x] make thumbnail responsive
• [x] hide toolbox on sm and lower
• [x] previous and next break badly
• [x] hide extent on sm view, or increase the column size as it does not fit
• [ ] check if Acta Carolinae thumbnail dimensions can be fixed
• [x] at item level reduce spaces in left panel (using sass #51 )

[empt-ak]

Acta Carolinae has thumbnail of different dimensions 146x200 while the others have 134x200

[empt-ak]

following code makes website title vertically aligned:

.vertical-wrapper
{
    display: table;
    overflow: hidden;
    height: 150px;
}

.vertical-align
{
    display: table-cell;
    vertical-align: middle;
}

<div class="vertical-wrapper">
    <h1 class="vertical-align">
        <a class="page-header" href="/digilib5">Digitální knihovna Filozofické fakulty Masarykovy univerzity</a>
    </h1>
</div>