[fix] apply changes in infobox's styles

changes were made for wolframalpha infobox:

    - wrap text inside infobox.
      for example, there's a hill in New Zealand called
      Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu
      (don't blame me, blame the Kiwis)
      and now it doesn't break the infobox.

    - add an optional image field for infobox's attributes.
      (doesn't affect ddg infobox at all)

    - table is now always split in half.
      needed so that images stay inside infobox.
      (max-width doesn't work for inline elements, it's the table
      that has to set the width.

if you don't like how the table width looks now in ddg/wiki's infobox,
i can change that code so that the style only applies when using
wolframalpha.

searx/static/themes/oscar/less/oscar/infobox.less

@@ -1,7 +1,8 @@
 .infobox {
     .infobox_part {
         margin-bottom: 20px;
-         word-wrap: break-word;
+        word-wrap: break-word;
+        table-layout: fixed;
     }
     
     .infobox_part:last-child {