[web] incorrect dropdown position on playlist right-click

[urbainn]

Describe the bug On the web app, in the library, right-clicking a playlist opens a dropdown menu, except it is not correctly positioned, in my browser, it's displayed too much on the right.

To Reproduce Steps to reproduce the behavior:

1. Go to 'Library'/'Your library'
2. Right-click on any playlist
3. Dropdown menu should open, but not where the mouse is

Expected behavior I would have expected the dropdown menu to open where my mouse is currently positioned, or maybe on a fixed point next to the playlist element.

Screenshots If applicable, add screenshots to help explain your problem. These are very helpful!

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome
• Version: 116.0.5845.180 (Official build) (64 bits)

Smartphone (please complete the following information): N/A

[riverscuomo]

fixed by subtracting 500 from left

  static showContextMenuForSearchOthersPlaylist(
    BuildContext context,
    Offset offset,
    String playlistId,
  ) async {
    final left = offset.dx - 500;