Feature/unify api forms

[55]

Closes #368

[55]

@mauriciovieira and/or @frenchbread, could you please review this PR, since we were working on it together with Brylie?

[jykae]

@elnzv @brylie Will this fix issue https://github.com/apinf/api-umbrella-dashboard/issues/602 ? In version 0.1.0 the labels for Backend host & Frontend host should be switched, otherwise they go wrong when backend is sent to Umbrella.

[frenchbread]

Found an issue:

If current user does not have a permission to edit an apiBackend -> page counties to load and no error (e.g. 404) is given.

If a backend, to which user is trying to navigate does not exist, error is also not given. Page infinitely continues to load.

@elnzv Could this one be fixed?

[frenchbread]

Code looks good though!

[55]

@frenchbread, same issue in develop branch.
I think we need to create a separate issue for this.

[frenchbread]

Ok then. Merging this.