Add check for undefined or empty string and array in 'GroupMembers'.

Check if the provided string or array is not undefined or empty
when converting between these two types.
Add validation when creating a new group.
Remove duplicated create group form.
Add validation for group edit form.
Add 'AccountValidator' and use it for validating create account form.
Add validation on 'ManageAccount' page.
Refactor Account controllers.

Add a new 'BaseAccountContrller' which is inherited by
'AddAccountController' and 'ManageAccountController'.

Refactor 'ManageAccountController'.
Fix 'twoFactor' toggle when creating an account.
Add confirm dialog when bulk deleting.
Add single delete button for the selected account.
Fix sorting of accounts list.
Remove unused 'getStatus' helper.
Add ability to change password from 'manageAccount' page.
Move account bulk actions to it's own partial.
Add toggling account bulk actions based on selected accounts.
Change bulk account actions to buttons.
Remove account individual status toggle.
Add Profile page with account update form.
Add two-factor Auth toggle to profile page.
Add link to change password to profile page.