Full hi-DPI support (#786)

* Support retina screens

* Update menu assets

* Update active state of clipboard icon

* Update menu color

* Update small menu

Author: TheoChevalier

app/classes/Transvision/ShowResults.php

@@ -387,7 +387,7 @@ public static function resultsTable($search_object, $search_results, $page)
                 $target_string = '<em class="error">Warning: Empty string</em>';
             } else {
                 $meta_target = "
-                      <span class='clipboard' data-clipboard-target='#{$clipboard_target_string}' alt='Copy to clipboard'><img src='/img/copy_icon_black_18x18.png'></span>
+                      <span class='clipboard' data-clipboard-target='#{$clipboard_target_string}' alt='Copy to clipboard'></span>
                       {$error_message}";
             }
 
@@ -397,7 +397,7 @@ public static function resultsTable($search_object, $search_results, $page)
             } elseif (! $target_string2) {
                 $target_string2 = '<em class="error">Warning: Empty string</em>';
             } else {
-                $meta_target2 = "<span class='clipboard' data-clipboard-target='#{$clipboard_target_string2}' alt='Copy to clipboard'><img src='/img/copy_icon_black_18x18.png'></span>";
+                $meta_target2 = "<span class='clipboard' data-clipboard-target='#{$clipboard_target_string2}' alt='Copy to clipboard'></span>";
             }
 
             // Replace / and : in the key name and use it as an anchor name

app/views/results_entities.php

@@ -75,7 +75,7 @@
         } elseif (! $target_string2) {
             $target_string2 = '<em class="error">Warning: Empty string</em>';
         } else {
-            $meta_target2 = "<span class='clipboard' data-clipboard-target='#{$clipboard_target_string2}' alt='Copy to clipboard'><img src='/img/copy_icon_black_18x18.png'></span>";
+            $meta_target2 = "<span class='clipboard' data-clipboard-target='#{$clipboard_target_string2}' alt='Copy to clipboard'></span>";
         }
 
         $extra_column_rows = "
@@ -138,7 +138,7 @@
     } else {
         $meta_target = "
           {$error_message}
-          <span class='clipboard' data-clipboard-target='#{$clipboard_target_string}' alt='Copy to clipboard'><img src='/img/copy_icon_black_18x18.png'></span>";
+          <span class='clipboard' data-clipboard-target='#{$clipboard_target_string}' alt='Copy to clipboard'></span>";
     }
 
     $table .= "