Update translations for English and Icelandic languages, changed colors of some icons, added more icons.

assets/search_light.svg

@@ -1,4 +1,4 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-search-heart" viewBox="0 0 16 16">
+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" fill="#212121" class="bi bi-search-heart" viewBox="0 0 16 16">
   <path d="M6.5 4.482c1.664-1.673 5.825 1.254 0 5.018-5.825-3.764-1.664-6.69 0-5.018"/>
   <path d="M13 6.5a6.47 6.47 0 0 1-1.258 3.844q.06.044.115.098l3.85 3.85a1 1 0 0 1-1.414 1.415l-3.85-3.85a1 1 0 0 1-.1-.115h.002A6.5 6.5 0 1 1 13 6.5M6.5 12a5.5 5.5 0 1 0 0-11 5.5 5.5 0 0 0 0 11"/>
-</svg>
+</svg>

assets/visit_dark.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" fill="#cecece" class="bi bi-arrow-up-right-circle" viewBox="0 0 16 16">
+  <path fill-rule="evenodd" d="M1 8a7 7 0 1 0 14 0A7 7 0 0 0 1 8m15 0A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.854 10.803a.5.5 0 1 1-.708-.707L9.243 6H6.475a.5.5 0 1 1 0-1h3.975a.5.5 0 0 1 .5.5v3.975a.5.5 0 1 1-1 0V6.707z"/>
+</svg>

assets/visit_light.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" fill="#212121" class="bi bi-arrow-up-right-circle" viewBox="0 0 16 16">
+  <path fill-rule="evenodd" d="M1 8a7 7 0 1 0 14 0A7 7 0 0 0 1 8m15 0A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.854 10.803a.5.5 0 1 1-.708-.707L9.243 6H6.475a.5.5 0 1 1 0-1h3.975a.5.5 0 0 1 .5.5v3.975a.5.5 0 1 1-1 0V6.707z"/>
+</svg>