Redmine

The current implementation in application.js attempts to focus on all elements matching .drdn-items a.selected when the project jump dropdown is expanded. This can cause unpredictable behavior if multiple elements match this selector, as only one element should receive focus.

This patch modifies the code to explicitly focus only on the first selected element by adding the .first() method before calling .focus(). This ensures consistent behavior when navigating the project selector dropdown.

In the project selection dropdown in the upper right corner, when you open a bookmarked project, the project that gets selected is not the one in the bookmark area but the one in the list below. I believe this degrades the usability when switching between bookmarked projects during work.

Steps to reproduce:

1. Have multiple projects that could be selected in the project jump dropdown
2. Bookmark one
3. Open the project selector dropdown
4. Select the bookmarked project and see the selected position

This is a simple fix that improves the reliability of the project navigation interface.