client.mixins.widesky.crud: Fix CRUD endpoints.
client.mixins.widesky.crud: Fix CRUD endpoints.

Turns out they're not named 'create', 'update' and 'delete', consistent
with the 'read' operation, but instead are 'createRec', 'updateRec' and
'deleteRec', with who knows what expected in the grid itself.

ChristianTremblay/pyhaystack,ChristianTremblay/pyhaystack,vrtsystems/pyhaystack