fix(frontend): click on inputs (#2212)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/studio/components/BrainsTabs/components/BrainItem/BrainItem.tsx

@@ -59,7 +59,6 @@ export const BrainItem = ({ brain, even }: BrainItemProps): JSX.Element => {
         !optionsRef.current.contains(event.target as Node)
       ) {
         setOptionsOpened(false);
-        event.preventDefault();
       }
     };
     document.addEventListener("mousedown", handleClickOutside);

frontend/lib/components/Menu/components/ThreadsButton/ThreadsSection/ThreadItem/ThreadItem.tsx

@@ -58,7 +58,6 @@ export const ThreadItem = ({
         !optionsRef.current.contains(event.target as Node)
       ) {
         setOptionsOpened(false);
-        event.preventDefault();
       }
     };
     document.addEventListener("mousedown", handleClickOutside);