Device import - Subnet scan

1) User should see this when coming into the "Network scan" view for the first time.
First time here means that no scan presets are configured.

2) This shows new scan preset creation.
Description is optional.
Checkbox default status should be as on the screenshot.
If "Schedule this scan" is checked, a schedule from Schedules has to be selected.

In Schedules, we need to show schedule usage for scans (same as we do for NMS syncs)

"Add device" button should not be visible unless user disables "Automatically add devices".
If that is disabled, the button should be visible, but not enabled until user select some devices in the table.

When scan running, "Scan progress" should show % of scan done.
We should also have a spinning indicator, to indicate scan is running.

When scan finishes and devices are added to Unimus (assuming "Automatically add devices"), we should publish an ImportResult.
So user gets notifications (both on success and fail - since adding devices found in scan can fail because of insufficient licenses, etc.)

3) Shows defined scan presets user has.
When clicking "Select scan", it should open it as shown on Mockup 2, but with results of last scan in the table.

"How does Network scan" work should show the same text as on Mockup 1.