Various fixes for docked Drawer variant sizing/positioning

[philippjfr]

Fixes a few issues with the new docked drawer variant:

1. No longer takes up space when closed.
2. The dock tab doesn't take up space.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.09%. Comparing base (5a43c8d) to head (96c9197).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #709   +/-   ##
=======================================
  Coverage   85.09%   85.09%           
=======================================
  Files          33       33           
  Lines        3851     3851           
=======================================
  Hits         3277     3277           
  Misses        574      574           

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