feat(validations): support letters of all existing languages as the 1st letter of entities

[coveralls]

Pull Request Test Coverage Report for Build 1541

• 5 of 6 (83.33%) changed or added relevant lines in 3 files are covered.
• 95 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.05%) to 53.794%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/app/shared/components/create-update-delete-dialog/create-update-delete-dialog.component.ts	2	3	66.67%
<!--	Total:	5	6	83.33%	-->

Files with Coverage Reduction	New Missed Lines	%
src/app/shared/components/create-update-delete-dialog/create-update-delete-dialog.component.ts	1	43.02%
src/app/vm/container/vm-filter.container.ts	26	35.37%
src/app/reducers/vm/redux/vm.reducers.ts	68	33.33%
<!--	Total:	95		-->

Totals
Change from base Build 1525:	-0.05%
Covered Lines:	8864
Relevant Lines:	14566

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💛 - Coveralls