Fixed EZP-20451: block_view_gui for a manual fetched block don't use ove...

...rride templates

Issue: https://jira.ez.no/browse/EZP-20451

When using the `eZPageBlock::fetch()` method, the attributes `type` and `view` were not correctly set. The former was created as `block_type`, the second was completely missing.

Additionally, when called, a notice was shown because this non static method was used statically.