layout: Extract ScrollingSpace

Leave the Workspace to do the workspace parts, and extract the scrolling parts
into a new file. This is a pre-requisite for things like the floating layer
(which will live in a workspace alongside the scrolling layer).

As part of this huge refactor, I found and fixed at least these issues:
- Wrong horizontal popup unconstraining for a smaller window in an
  always-centered column.
- Wrong workspace switch in focus_up_or_right().
This commit is contained in:
Ivan Molodetskikh
2024-11-30 09:18:33 +03:00
parent 1e76716819
commit 8665003269
10 changed files with 4499 additions and 4125 deletions
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