[ux] No Visual Indicator for Scrollable Dropdown Menu

[mullender]

Before submitting a bug please read: https://zwave-js.github.io/zwavejs2mqtt/#/troubleshooting/bug_report

Version 2.0.0

Build/Run method

• Docker
• PKG
• Manually built (git clone - npm install - npm run build )

zwavejs2mqtt version: 1.1.0
zwavejs version: 6.5.0

Describe the bug

The controller actions dropdown menu is not obviously scollable
It took me looking at the page source code to figure out that there is a 'firmware update' action in the dropdown menu. After I found that I discovered that the dropdown was scrollable.

It would be nice if there was some indication that the dropdown was scrollable. Perhaps if the bottom most action was only partially visible (clipped at the bottom) it would become immediately clear there are more options below.

Anyway not a big deal.