[Feature Request]: Standardize the bottom bar color with the rest of the interface

### What would you like to happen?

Adjust the highlighted bottom bar to use the same shade of gray as the top section of the interface. The goal is to maintain visual consistency, improve the user experience, and prevent this element from feeling disconnected from the rest of the layout.

Note: It would just be an adjustment to the bottom bar's color so it covers the entire bar; that way, it matches the top section and doesn't look misaligned...

### Issue Priority

Priority: 3

### Issue Component

Component: Hop Gui

Start by locating the Hop Gui implementation for the highlighted bottom bar and the top interface section whose gray shade it should match. Use the attached screenshot and existing interface styling as the reference, then verify that the selected color covers the entire bottom bar and remains visually consistent in the running application.

Written by the indexing model from the issue text.