Closes#10930Closes#11353
Release Notes:
- Adds commands to project_panel
- `ctrl-u` scrolls the project_panel up half of the visible entries
- `ctrl-d` scrolls the project_panel down half of the visible entries
- `z z` scrolls current selection to center of window
- `z t` scrolls current selection to top of window
- `z b` scrolls current selection to bottom of window
- `{num} j` and `{num} k` now move up and down with a count