Backend for namespace selection

Localization of 2 resource creation dialogs

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'Image Pull Secret' create dialog and 'Namespace' create dialog on the
deploy page.

Now default behavior is to omit kube-system namespace when listing all.
In a future PR I'll add namespace selector.

Now all list pages can be optionally filtered by (multiple) namespaces.

Try it, e.g.,: http://localhost:9090/api/v1/workload/default

Redesign of expose service externally

Deployment details frontend

Deployment detail backend

Applies to: #719

Improved localization through google getMsg()

Bugfix #762 - nullpointer dereference at RS / Deployments lists

Nullpointer dereference when RS / Deployments are not supported by kubernetes

Add generic delete actionbar item component

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Fix overlay toolbar bug and streamline toolbar experience

1. Previously when you open a menu (e.g., delete resource) the actionbar
would hide. Now this is fixed.
2. Started using official material style on toolbars. This means less
our code.

Fix generic delete: make it work with extension resources

Fix actionbar icons overflow resource name