fix: some ui issues (#346)

* fix: scroll button not visible in light mode

* fix: sidebar when there is a folder

When a folder is added in the sidebar and there are less items scroll
bar appears. This simple change fixes that behaviour

* fix: small devices regerate/Stop button below input

Below 768px Stop Genrating and Regerate Button remains hidden behind the
input. This is the fix for that

components/Chatbar/Chatbar.tsx

@@ -176,7 +176,7 @@ export const Chatbar: FC<Props> = ({
 
         {conversations.length > 0 ? (
           <div
-            className="h-full pt-2"
+            className="pt-2"
             onDrop={(e) => handleDrop(e)}
             onDragOver={allowDrop}
             onDragEnter={highlightDrop}