Redmine

Ref.: Sponsor a Feature: Project Search Optimization

Given that we currently have projects rendered as a tree in the project select field (r8534), the change as proposed in this issue is blocked by #34288 to prevent functional regression.

An example of how a searchable tree dropdown could look like:
https://vue-treeselect.js.org/#nested-search

This combines a dropdown with Tree view and a search without loosing the tree path information.

Here is another example of a searchable tree without loosing path information.

https://js.devexpress.com/Demos/WidgetsGallery/Demo/TreeView/TreeViewWithSearchBar/jQuery/Light/

This would be great as an option for other project selection dropdowns as well, e.g. when creating new time entries.

+1