[Feat]: Make dropdown menu buttons more visually consistant with the rest of boum

[PowerUser64]

Description

All of the dropdown menu buttons in boum are very visually different from the rest of the app's design; they have a light background and are square, which is different from most other buttons in boum that don't have edges or backgrounds. I think it would be good to bring these dropdown menus more in line with what the rest of boum looks like.

Some examples of these menus can be found in the ellipsis menu on the player screen and the list creation screen. Here's a screenshot showing the ones in the player ellipsis menu.

Understanding that boum is open-source software

• [X] I understand