newui: Copy/Paste of identical object

When the object to be pasted exists already in the destinatio
folder, the user is prompt to choose between adding a new
version of the file or creating a copy of it
newui: Remove dialog modal on transition
newui: full page errors (404, 503)

tba...
temp same with prev commit

add additional data of error 404, when they are available
temp show error of action
temp: add validation to create-container input

Now is set in the containers-controller.
Should make a view with an input and an area that in it will show
the results of validation.
temp
temp

pending:
- add the input with valid at rename and create directory
- set a simple style
- clean up
temp