ENG-1119 - Change add icon to settings icon (#580)

* Refactor: Change 'plus' icon to 'cog' in LeftSidebarView

Co-authored-by: mclicks <mclicks@gmail.com>

* Refactor: Use 'settings' icon instead of 'cog'

Co-authored-by: mclicks <mclicks@gmail.com>

* Refactor: Update settings icon size in LeftSidebarView for consistency

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: mdroidian

apps/roam/src/components/LeftSidebarView.tsx

@@ -387,7 +387,7 @@ const FavoritesPopover = ({ onloadArgs }: { onloadArgs: OnloadArgs }) => {
           }
         >
           <span ref={menuTriggerRef} className="sidebar-title-button-add p-1">
-            <Icon icon="plus" iconSize={14} />
+            <Icon icon="settings" size={14} />
           </span>
         </Popover>
       </div>