Change list title input styling (#17092)

app/javascript/styles/mastodon/components.scss

@@ -3074,17 +3074,20 @@ a.account__display-name {
   box-sizing: border-box;
   width: 100%;
   margin: 0;
-  color: $inverted-text-color;
-  background: $simple-background-color;
-  padding: 10px;
+  color: $darker-text-color;
+  background: transparent;
+  padding: 7px 0;
   font-family: inherit;
   font-size: 14px;
   resize: vertical;
   border: 0;
+  border-bottom: 2px solid $ui-primary-color;
   outline: 0;
-  border-radius: 4px;
 
-  &:focus {
+  &:focus,
+  &:active {
+    color: $primary-text-color;
+    border-bottom-color: $ui-highlight-color;
     outline: 0;
   }