refactor: update button styling to make it consistent with rest of UI

Author: devvaannsh

src/styles/Extn-CollapseFolders.less

@@ -3,9 +3,10 @@
     flex-direction: column;
     align-items: center;
     justify-content: center;
-    padding: 0.2em 0.4em;
+    padding: 0.2em 0.65em;
+    margin-top: 0.1em;
     position: absolute !important;
-    right: 0.5em;
+    right: 0;
     opacity: 0;
     visibility: hidden;
     transition: