refactor: Stop using spread list operator

[provokateurin]

Towards #696

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 28.44%. Comparing base (74c469d) to head (bb8a296).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1872   +/-   ##
=======================================
  Coverage   28.44%   28.44%           
=======================================
  Files         201      201           
  Lines       67448    67448           
=======================================
  Hits        19183    19183           
  Misses      48265    48265           

Flag	Coverage Δ		*Carryforward flag
dynamite	35.88% <ø> (ø)
dynamite_end_to_end_test	60.88% <ø> (ø)
dynamite_runtime	57.68% <ø> (ø)		Carriedforward from d5af53a
neon_dashboard	92.56% <ø> (ø)
neon_framework	37.44% <0.00%> (ø)
neon_talk	100.00% <ø> (ø)
nextcloud	25.76% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.

Files	Coverage Δ
...n_framework/lib/src/pages/login_check_account.dart	0.00% <0.00%> (ø)
...ework/lib/src/pages/login_check_server_status.dart	0.00% <0.00%> (ø)
...ckages/neon_framework/lib/src/widgets/app_bar.dart	2.17% <0.00%> (ø)
...ork/lib/src/pages/app_implementation_settings.dart	0.00% <0.00%> (ø)
...ackages/neon_framework/lib/src/pages/settings.dart	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes