Outstanding UI Fixes

[bhumulanandinireddy]

Issue Description:

Current Status:

• Users find the space between uploaded files and their filenames, as well as the space between search terms and the search bar, too minimal, making the UI appear cluttered.
• Buttons such as "Submit Search Query," "Preview," and "Download" currently have a slightly duller shade but remain visually similar. They should be changed to a distinctly dull color to differentiate them from active buttons.
• Clicking on non-active buttons does not provide any hint or message to guide users.

Screen Shots

Acceptance Criteria:

1. Spacing Improvement: Increase the space between uploaded files and their filenames for better readability, as well as between the searched term and the search bar.
2. Button Styling: Change inactive buttons (e.g., "Submit Search Query," "Preview," and "Download") to a distinctly dull color to indicate they are disabled.
3. Interactivity: When users click on disabled buttons, display a tooltip or hint message explaining why the action cannot be performed.