d2a802d3c6
Remove the box select tool from the timeline to simplify selection
logic, avoid confusion for users, and make maintaining the code
easier in the future. It also brings the selection system closer
to other industry-standard NLEs.
It also fixes an issue caused by d2091b4b1.
More details in PR.
Pull Request: https://projects.blender.org/blender/blender/pulls/128051