Problem description: both parameters of wmi.get and wmi.getall keys are marked as optional in frontend and documentation (placed in triangle brackets), which is not true - both parameters are mandatory for both mentioned metrics.

Steps to reproduce:

1. Open the list of items on any host
2. Press "Create item" button
3. In the opened form open the list of possible Zabbix agent keys
4. Find wmi.get and wmi.getall keys and check their patameters

Result: both parameters are marcked as optional for both metrics:

Expected: both namespace and query parameters are actually mandatory for these wmi metrics.