feat: hide CR timetable in the presence of special alerts #5578

Job	Run time
file_changes	3s
Build application and assets	5m 53s
Build Docker image	6m 58s
Linting / CSS	32s
Linting / TypeScript	45s
Unit tests / JavaScript / Mocha	46s
Linting / Elixir	3m 35s
Linting / JavaScript	32s
Formatting / Elixir	3m 21s
Formatting / JavaScript & TypeScript	29s
Unit tests / JavaScript & TypeScript / Jest	2m 18s
Type checks / Elixir	4m 8s
Type checks / TypeScript	31s
Unit tests / Elixir / mix coveralls.html	1m 10s
	31m 1s

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