Ensure Feed and scrollable layout children heights are not fixed

[philippjfr]

Feed and scrollable layouts don't really have a limit on the height of their children but in many cases the children might set max-height: 100% to avoid overflow. Here we apply styles that override this default to ensure that the children can be larger than their container.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.11%. Comparing base (0eb63a0) to head (ac9d815).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7747   +/-   ##
=======================================
  Coverage   87.10%   87.11%           
=======================================
  Files         346      346           
  Lines       52759    52759           
=======================================
+ Hits        45956    45959    +3     
+ Misses       6803     6800    -3     

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