feat: hide CR timetable in the presence of special alerts #5610

Job	Run time
Build Docker image	2m 56s
file_changes	7s
Build application and assets	2m 53s
Linting / TypeScript	35s
Formatting / JavaScript & TypeScript	29s
Linting / Elixir	2m 42s
Formatting / Elixir	2m 41s
Unit tests / JavaScript / Mocha	35s
Unit tests / JavaScript & TypeScript / Jest	2m 10s
Linting / JavaScript	20s
Linting / CSS	32s
Type checks / Elixir	2m 26s
Type checks / TypeScript	29s
Unit tests / Elixir / mix coveralls.html	1s
	18m 56s

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