Current default tool is "sample" which is a bit odd, and coupled with
the fact that the toolbar is hidden by default, this can be confusing
to new users, leading them to believe tweak/select tools are not
supported for the VSE preview.
This change:
- Sets "box select" as the default tool for the Preview
- Makes both Preview and Timeline toolbars shown by default
Pull Request: https://projects.blender.org/blender/blender/pulls/126336
a21a1a7b86