Fix/dropdown of search bar in upcoming event section

[anwesha2002]

Related Issue

Closes: #1549

Description

This PR fixes the issue of the dropdown of the search bar going behind the event card and makes it elevated

Screenshots

Checklist

• [ x] My code adheres to the established style guidelines of the project.
• [x ] I have included comments in areas that may be difficult to understand.
• [ x] My changes have not introduced any new warnings.
• [ x] I have conducted a self-review of my code.