Fix search result's thumbnails that overlap

Fix search result's thumbnails that overlap.
Now it uses the "height" property instead of "padding-top".

dspace/modules/xmlui/src/main/webapp/themes/Participatorio-mobile/lib/m-tweaks.css

@@ -555,11 +555,6 @@ ul.ds-artifact-list li {
 	clear: both;
 }
 
-div#aspect_discovery_SimpleSearch_div_search > div.pagination-masked.bottom {
-padding-top: 20px;
-clear: both;
-}
-
 div#aspect_discovery_SimpleSearch_div_search-results ul {
 padding-left: 0px;
 }
@@ -571,6 +566,5 @@ position: absolute;
     
 div#aspect_discovery_SimpleSearch_div_search-results ul div.artifact-description {
 padding-left: 70px;
-padding-bottom: 25px;
+height: 100px;
 }
-