Dev Build 2134 is out now.
Firstly, the side bar can receive input focus, and is navigable with the keyboard. To give input focus to the side bar, you need to click on an already selected item. You can put input focus back to a text buffer via pressing escape, enter, or ctrl+1. I’m planning to adding an explicit key binding to set focus to the sidebar, but it’s not there yet.
The find panel has also been changed to only have two fields, rather than three. The previous “In Files” and “In Location” fields have been combined into a single “Where” field. There used to be special values and to search open files and folders respectively: now they will be implicitly searched, unless a path is explicitly given. The “…” button should provide a guide on the syntax accepted by the Where field.