Revert "Removed height of filter/details button"

This reverts commit fa69ffd6.

ckanext/odsh/assets/odsh.css

@@ -3002,6 +3002,7 @@ body.filters-modal div.row>aside.secondary.span3 {
     box-sizing: border-box;
     display: inline-block;
     width: auto;
+    height: 40px;
     background-color: var(--odsh-color-sh-blue-2);
     color: white;
     font-size: 18px;