Tests for these new helper methods

…based on whether the current user owns the parent group and whether the parent group or current group is share locked.

[ci skip]

`breadcrumb_title` is then overriden when needed

Groups can enable/disable LFS, but this setting can be overridden at the project level. Admin only

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

- Some views had a "Close" button. We've removed this, because we don't
  want users accidentally hiding the validation errors and not knowing
  what needs to be fixed.
- Some views used `li`, some used `p`, some used `span`. We've
  standardized on `li`.
- Some views only showed the first error. We've standardized on showing
  all of them.
- Some views added an `#error_explanation` div, which we've made
  standard.