[Freestyler] Remove border outline when disabled

We need to keep the border to make the textarea not change size.

Fixed: 372633018
Change-Id: I0b9c4436b6803f1254528d48126dea1833e13cba
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5934351
Commit-Queue: Nikolay Vitkov <[email protected]>
Reviewed-by: Ergün Erdoğmuş <[email protected]>
Auto-Submit: Nikolay Vitkov <[email protected]>
Commit-Queue: Ergün Erdoğmuş <[email protected]>

Author: Lightning00Blade

front_end/panels/freestyler/components/freestylerChatUi.css

@@ -76,6 +76,7 @@
   &:disabled {
     color: var(--sys-color-state-disabled);
     background-color: var(--sys-color-state-disabled-container);
+    border-color: transparent;
   }
 }